Live analysis

3,131

3,131 is a composite number, odd.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

3,131 (three thousand one hundred thirty-one) is an odd 4-digit number. It is a composite number with 4 divisors, and factors as 31 × 101. Written other ways, in Roman numerals it is MMMCXXXI and in binary, 110000111011.

Arithmetic Number Cube-Free Deficient Number Gapful Number Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree Undulating Number

Interestingness

★ ★ ★ ★ ☆

7 notable facts · grade B

3,119 3,120 3,121 3,122 3,123 3,124 3,125 3,126 3,127 3,128 3,129 3,130 3,131 3,132 3,133 3,134 3,135 3,136 3,137 3,138 3,139 3,140 3,141 3,142 3,143

less more

Properties

Parity: Odd
Digit count: 4
Digit sum: 8
Digit product: 9
Digital root: 8
Palindrome: No
Bit width: 12 bits
Reversed: 1,313
Recamán's sequence: a(1,701) = 3,131
Square (n²): 9,803,161
Cube (n³): 30,693,697,091
Divisor count: 4
σ(n) — sum of divisors: 3,264
φ(n) — Euler's totient: 3,000
Sum of prime factors: 132

Primality

Prime factorization: 31 × 101

Nearest primes: 3,121 (−10) · 3,137 (+6)

Divisors & multiples

All divisors (4)

1 · 31 · 101 · 3131

Aliquot sum (sum of proper divisors): 133

Factor pairs (a × b = 3,131)

1 × 3131

31 × 101

First multiples

3,131 · 6,262 (double) · 9,393 · 12,524 · 15,655 · 18,786 · 21,917 · 25,048 · 28,179 · 31,310

Sums & aliquot sequence

As consecutive integers: 1,565 + 1,566 86 + 87 + … + 116 20 + 21 + … + 81

Aliquot sequence: 3,131 → 133 → 27 → 13 → 1 → 0 — terminates at zero

Continued fraction of √n

√3,131 = [55; (1, 21, 2, 1, 1, 3, 1, 7, 4, 1, 2, 1, 4, 7, 1, 3, 1, 1, 2, 21, 1, 110)]

Period length 22 — the block in parentheses repeats forever.

Representations

In words: three thousand one hundred thirty-one
Ordinal: 3131st
Roman numeral: MMMCXXXI
Binary: 110000111011
Octal: 6073
Hexadecimal: 0xC3B
Base64: DDs=
One's complement: 62,404 (16-bit)
Scientific notation: 3.131 × 10³
As a duration: 3,131 s = 52 minutes, 11 seconds

In other bases

ternary (3) 11021222

quaternary (4) 300323

quinary (5) 100011

senary (6) 22255

septenary (7) 12062

nonary (9) 4258

undecimal (11) 2397

duodecimal (12) 198b

tridecimal (13) 156b

tetradecimal (14) 11d9

pentadecimal (15) ddb

As an angle

3,131° = 8 × 360° + 251°

251° ≈ 4.381 rad

Compass bearing: WSW (west-southwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓏺
Greek (Milesian): ͵γρλαʹ
Mayan (base 20): 𝋧·𝋰·𝋫
Chinese: 三千一百三十一
Chinese (financial): 參仟壹佰參拾壹

In other modern scripts

Eastern Arabic ٣١٣١ Devanagari ३१३१ Bengali ৩১৩১ Tamil ௩௧௩௧ Thai ๓๑๓๑ Tibetan ༣༡༣༡ Khmer ៣១៣១ Lao ໓໑໓໑ Burmese ၃၁၃၁

Digit at this position in famous constants

π — Pi (π): Digit 3,131 = 9
e — Euler's number (e): Digit 3,131 = 1
φ — Golden ratio (φ): Digit 3,131 = 6
√2 — Pythagoras's (√2): Digit 3,131 = 1
ln 2 — Natural log of 2: Digit 3,131 = 2
γ — Euler-Mascheroni (γ): Digit 3,131 = 8

Also seen as

Hex color

#000C3B

RGB(0, 12, 59)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.12.59.

Address: 0.0.12.59
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.12.59

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

Musical pitch

Heard as a frequency, 3,131 Hz is closest to:

Concert pitch (A4 = 440 Hz): G7 (3136 Hz, -3¢)
Scientific pitch (C4 = 256 Hz): G7 (3068.5 Hz, +35¢)
Baroque pitch (A4 = 415 Hz): G♯7 (3133.7 Hz, -1¢)

Position in π

The digit sequence 3131 first appears in π at position 14,883 of the decimal expansion (the 14,883ordinal-suffix:rd digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 3131 on Pi Search ↗