Number

253

253 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Gapful Number Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree Triangular Year

Historical context — 253 AD

Calendar year

Year 253 (CCLIII) was a common year starting on Saturday of the Julian calendar.

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Historical context — 253 BC

Calendar year

Year 253 BC was a year of the pre-Julian Roman calendar.

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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: Saturday
January 1, 253
Ended on: Saturday
December 31, 253
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 250s
250–259
Century: 3rd century
201–300
Millennium: 1st millennium
1–1000
Years ago: 1,773
1773 years before 2026.

In other calendars

Hebrew: 4013 / 4014 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Water zodiac:Rooster
Sexagenary cycle position 10 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 796 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 245 / 246 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 175 / 174 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 10
Digit product: 30
Digital root: 1
Palindrome: No
Bit width: 8 bits
Reversed: 352
Recamán's sequence: a(237) = 253
Square (n²): 64,009
Cube (n³): 16,194,277
Divisor count: 4
σ(n) — sum of divisors: 288
φ(n) — Euler's totient: 220
Sum of prime factors: 34

Primality

Prime factorization: 11 × 23

Nearest primes: 251 (−2) · 257 (+4)

Divisors & multiples

All divisors (4)

1 · 11 · 23 · 253

Aliquot sum (sum of proper divisors): 35

Factor pairs (a × b = 253)

1 × 253

11 × 23

First multiples

253 · 506 (double) · 759 · 1,012 · 1,265 · 1,518 · 1,771 · 2,024 · 2,277 · 2,530

Sums & aliquot sequence

As consecutive integers: 126 + 127 18 + 19 + … + 28 1 + 2 + … + 22

Aliquot sequence: 253 → 35 → 13 → 1 → 0 — terminates at zero

Representations

In words: two hundred fifty-three
Ordinal: 253rd
Roman numeral: CCLIII
Binary: 11111101
Octal: 375
Hexadecimal: 0xFD
Base64: /Q==
One's complement: 2 (8-bit)

In other bases

ternary (3) 100101

quaternary (4) 3331

quinary (5) 2003

senary (6) 1101

septenary (7) 511

nonary (9) 311

undecimal (11) 210

duodecimal (12) 191

tridecimal (13) 166

tetradecimal (14) 141

pentadecimal (15) 11d

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): σνγʹ
Mayan (base 20): 𝋬·𝋭
Chinese: 二百五十三
Chinese (financial): 貳佰伍拾參

In other modern scripts

Eastern Arabic ٢٥٣ Devanagari २५३ Bengali ২৫৩ Tamil ௨௫௩ Thai ๒๕๓ Tibetan ༢༥༣ Khmer ២៥៣ Lao ໒໕໓ Burmese ၂၅၃

Digit at this position in famous constants

π — Pi (π): Digit 253 = 5
e — Euler's number (e): Digit 253 = 2
φ — Golden ratio (φ): Digit 253 = 3
√2 — Pythagoras's (√2): Digit 253 = 9
ln 2 — Natural log of 2: Digit 253 = 5
γ — Euler-Mascheroni (γ): Digit 253 = 4

Also seen as

Unicode codepoint

Latin Small Letter Y With Acute

U+00FD

Lowercase letter (Ll)

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

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

Hex color

#0000FD

RGB(0, 0, 253)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.253.

Address: 0.0.0.253
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.253

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

NANP area code 253

The number 253 is an active NANP area code (North American Numbering Plan).

Primary area: Tacoma
Region: Washington
Country: United States

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 253 ↗