Number

202

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

Deficient Number Evil Number Palindrome Recamán's Sequence Semiprime Smith Number Squarefree Year

Historical context — 202 AD

Calendar year

Year 202 (CCII) was a common year starting on Friday of the Julian calendar.

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

Notable events — 202 BC

Oct 19 Scipio Africanus defeats Hannibal at Zama, ending the Second Punic War.

Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0

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: Friday
January 1, 202
Ended on: Friday
December 31, 202
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 200s
200–209
Century: 3rd century
201–300
Millennium: 1st millennium
1–1000
Years ago: 1,824
1824 years before 2026.

In other calendars

Hebrew: 3962 / 3963 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Water zodiac:Horse
Sexagenary cycle position 19 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 745 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 194 / 195 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 124 / 123 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 4
Digit product: 0
Digital root: 4
Palindrome: Yes
Bit width: 8 bits
Recamán's sequence: a(1,367) = 202
Square (n²): 40,804
Cube (n³): 8,242,408
Divisor count: 4
σ(n) — sum of divisors: 306
φ(n) — Euler's totient: 100
Sum of prime factors: 103

Primality

Prime factorization: 2 × 101

Nearest primes: 199 (−3) · 211 (+9)

Divisors & multiples

All divisors (4)

1 · 2 · 101 (half) · 202

Aliquot sum (sum of proper divisors): 104

Factor pairs (a × b = 202)

1 × 202

2 × 101

First multiples

202 · 404 (double) · 606 · 808 · 1,010 · 1,212 · 1,414 · 1,616 · 1,818 · 2,020

Sums & aliquot sequence

As a sum of two squares: 9² + 11²

As consecutive integers: 49 + 50 + 51 + 52

Aliquot sequence: 202 → 104 → 106 → 56 → 64 → 63 → 41 → 1 → 0 — terminates at zero

Representations

In words: two hundred two
Ordinal: 202nd
Roman numeral: CCII
Binary: 11001010
Octal: 312
Hexadecimal: 0xCA
Base64: yg==
One's complement: 53 (8-bit)

In other bases

ternary (3) 21111

quaternary (4) 3022

quinary (5) 1302

senary (6) 534

septenary (7) 406

nonary (9) 244

undecimal (11) 174

duodecimal (12) 14a

tridecimal (13) 127

tetradecimal (14) 106

pentadecimal (15) d7

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒌋𒌋𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓏺𓏺
Greek (Milesian): σβʹ
Mayan (base 20): 𝋪·𝋢
Chinese: 二百零二
Chinese (financial): 貳佰零貳

In other modern scripts

Eastern Arabic ٢٠٢ Devanagari २०२ Bengali ২০২ Tamil ௨௦௨ Thai ๒๐๒ Tibetan ༢༠༢ Khmer ២០២ Lao ໒໐໒ Burmese ၂၀၂

Digit at this position in famous constants

π — Pi (π): Digit 202 = 4
e — Euler's number (e): Digit 202 = 1
φ — Golden ratio (φ): Digit 202 = 0
√2 — Pythagoras's (√2): Digit 202 = 0
ln 2 — Natural log of 2: Digit 202 = 0
γ — Euler-Mascheroni (γ): Digit 202 = 6

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 202, here are decompositions:

3 + 199 = 202
5 + 197 = 202
11 + 191 = 202
23 + 179 = 202
29 + 173 = 202
53 + 149 = 202
71 + 131 = 202
89 + 113 = 202

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Capital Letter E With Circumflex

U+00CA

Uppercase letter (Lu)

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

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

HTTP status code

HTTP 202 Accepted — Request accepted but processing is not complete.

2xx class: Success.

Hex color

#0000CA

RGB(0, 0, 202)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.202.

Address: 0.0.0.202
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.202

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

NANP area code 202

The number 202 is an active NANP area code (North American Numbering Plan).

Primary area: Washington, D.C.
Region: District of Columbia
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 202 ↗