Live analysis

131,991

131,991 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.).

131,991 (one hundred thirty-one thousand nine hundred ninety-one) is an odd 6-digit number. It is a composite number with 4 divisors, and factors as 3 × 43,997. Written other ways, in hexadecimal, 0x20397.

Arithmetic Number Cube-Free Deficient Number Evil Number Recamán's Sequence Semiprime Squarefree

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

131,979 131,980 131,981 131,982 131,983 131,984 131,985 131,986 131,987 131,988 131,989 131,990 131,991 131,992 131,993 131,994 131,995 131,996 131,997 131,998 131,999 132,000 132,001 132,002 132,003

less more

Properties

Parity: Odd
Digit count: 6
Digit sum: 24
Digit product: 243
Digital root: 6
Palindrome: No
Bit width: 18 bits
Reversed: 199,131
Recamán's sequence: a(228,390) = 131,991
Square (n²): 17,421,624,081
Cube (n³): 2,299,497,584,075,271
Divisor count: 4
σ(n) — sum of divisors: 175,992
φ(n) — Euler's totient: 87,992
Sum of prime factors: 44,000

Primality

Prime factorization: 3 × 43997

Nearest primes: 131,969 (−22) · 132,001 (+10)

Divisors & multiples

All divisors (4)

1 · 3 · 43997 · 131991

Aliquot sum (sum of proper divisors): 44,001

Factor pairs (a × b = 131,991)

1 × 131991

3 × 43997

First multiples

131,991 · 263,982 (double) · 395,973 · 527,964 · 659,955 · 791,946 · 923,937 · 1,055,928 · 1,187,919 · 1,319,910

Sums & aliquot sequence

As consecutive integers: 65,995 + 65,996 43,996 + 43,997 + 43,998 21,996 + 21,997 + 21,998 + 21,999 + 22,000 + 22,001

Aliquot sequence: 131,991 → 44,001 → 19,569 → 8,943 → 4,113 → 1,841 → 271 → 1 → 0 — terminates at zero

Continued fraction of √n

√131,991 = [363; (3, 3, 1, 2, 7, 3, 2, 11, 2, 12, 3, 1, 2, 1, 1, 1, 1, 1, 47, 1, 4, 1, 1, 3, …)]

Representations

In words: one hundred thirty-one thousand nine hundred ninety-one
Ordinal: 131991st
Binary: 100000001110010111
Octal: 401627
Hexadecimal: 0x20397
Base64: AgOX
One's complement: 4,294,835,304 (32-bit)
Scientific notation: 1.31991 × 10⁵
As a duration: 131,991 s = 1 day, 12 hours, 39 minutes, 51 seconds

In other bases

ternary (3) 20201001120

quaternary (4) 200032113

quinary (5) 13210431

senary (6) 2455023

septenary (7) 1056546

nonary (9) 221046

undecimal (11) 90192

duodecimal (12) 64473

tridecimal (13) 48102

tetradecimal (14) 3615d

pentadecimal (15) 29196

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ͵ρλαϡϟαʹ
Mayan (base 20): 𝋰·𝋩·𝋳·𝋫
Chinese: 一十三萬一千九百九十一
Chinese (financial): 壹拾參萬壹仟玖佰玖拾壹

In other modern scripts

Eastern Arabic ١٣١٩٩١ Devanagari १३१९९१ Bengali ১৩১৯৯১ Tamil ௧௩௧௯௯௧ Thai ๑๓๑๙๙๑ Tibetan ༡༣༡༩༩༡ Khmer ១៣១៩៩១ Lao ໑໓໑໙໙໑ Burmese ၁၃၁၉၉၁

Also seen as

Unicode codepoint

𠎗

CJK Unified Ideograph-20397

U+20397

Other letter (Lo)

UTF-8 encoding: F0 A0 8E 97 (4 bytes).

Lookup U+20397 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#020397

RGB(2, 3, 151)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.2.3.151.

Address: 0.2.3.151
Class: reserved
IPv4-mapped IPv6: ::ffff:0.2.3.151

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

Possible US patent number

This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 131,991 and was likely granted around 1872.

Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.

Look up US131,991 on Google Patents ↗ Look up on USPTO ↗