Number

250

250 is a composite number, even, a calendar year.

Deficient Number Evil Number Recamán's Sequence Year

Historical context — 250 AD

Calendar year

Year 250 (CCL) was a common year starting on Tuesday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Historical context — 250 BC

Calendar year

Year 250 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Tuesday
January 1, 250
Ended on: Tuesday
December 31, 250
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 250s
250–259
Century: 3rd century
201–300
Millennium: 1st millennium
1–1000
Years ago: 1,776
1776 years before 2026.

In other calendars

Hebrew: 4010 / 4011 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Horse
Sexagenary cycle position 7 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 793 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 242 / 243 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 172 / 171 Saka
Indian national calendar; year starts in March.

Cultural significance

Chinese slang

Mild insult — equivalent to calling someone an idiot.

Origin disputed; commonly traced to ancient currency where 1,000 coins = 1 string; half-mad = 半瓶醋 ("half a bottle of vinegar").

Sourced from Wikipedia (Numerology, Chinese numerology, Gematria, and per-culture articles).

Properties

Parity: Even
Digit count: 3
Digit sum: 7
Digit product: 0
Digital root: 7
Palindrome: No
Bit width: 8 bits
Reversed: 52
Recamán's sequence: a(243) = 250
Square (n²): 62,500
Cube (n³): 15,625,000
Divisor count: 8
σ(n) — sum of divisors: 468
φ(n) — Euler's totient: 100
Sum of prime factors: 17

Primality

Prime factorization: 2 × 5 ³

Nearest primes: 241 (−9) · 251 (+1)

Divisors & multiples

All divisors (8)

1 · 2 · 5 · 10 · 25 · 50 · 125 (half) · 250

Aliquot sum (sum of proper divisors): 218

Factor pairs (a × b = 250)

1 × 250

2 × 125

5 × 50

10 × 25

First multiples

250 · 500 (double) · 750 · 1,000 · 1,250 · 1,500 · 1,750 · 2,000 · 2,250 · 2,500

Sums & aliquot sequence

As a sum of two squares: 5² + 15² = 9² + 13²

As consecutive integers: 61 + 62 + 63 + 64 48 + 49 + 50 + 51 + 52 3 + 4 + … + 22

Aliquot sequence: 250 → 218 → 112 → 136 → 134 → 70 → 74 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Representations

In words: two hundred fifty
Ordinal: 250th
Roman numeral: CCL
Binary: 11111010
Octal: 372
Hexadecimal: 0xFA
Base64: +g==
One's complement: 5 (8-bit)

In other bases

ternary (3) 100021

quaternary (4) 3322

quinary (5) 2000

senary (6) 1054

septenary (7) 505

nonary (9) 307

undecimal (11) 208

duodecimal (12) 18a

tridecimal (13) 163

tetradecimal (14) 13c

pentadecimal (15) 11a

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋
Egyptian hieroglyphic: 𓍢𓍢𓎆𓎆𓎆𓎆𓎆
Greek (Milesian): σνʹ
Mayan (base 20): 𝋬·𝋪
Chinese: 二百五十
Chinese (financial): 貳佰伍拾

In other modern scripts

Eastern Arabic ٢٥٠ Devanagari २५० Bengali ২৫০ Tamil ௨௫௦ Thai ๒๕๐ Tibetan ༢༥༠ Khmer ២៥០ Lao ໒໕໐ Burmese ၂၅၀

Digit at this position in famous constants

π — Pi (π): Digit 250 = 9
e — Euler's number (e): Digit 250 = 8
φ — Golden ratio (φ): Digit 250 = 6
√2 — Pythagoras's (√2): Digit 250 = 8
ln 2 — Natural log of 2: Digit 250 = 9
γ — Euler-Mascheroni (γ): Digit 250 = 7

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 250, here are decompositions:

11 + 239 = 250
17 + 233 = 250
23 + 227 = 250
53 + 197 = 250
59 + 191 = 250
71 + 179 = 250
83 + 167 = 250
101 + 149 = 250

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Small Letter U With Acute

U+00FA

Lowercase letter (Ll)

UTF-8 encoding: C3 BA (2 bytes).

Lookup U+00FA on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0000FA

RGB(0, 0, 250)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.250.

Address: 0.0.0.250
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.250

Unspecified address (0.0.0.0/8) — "this network" placeholder.

NANP area code 250

The number 250 is an active NANP area code (North American Numbering Plan).

Primary area: Outside Vancouver
Region: British Columbia
Country: Canada

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 250 ↗