131,521
131,521 is a composite number, odd.
131,521 (one hundred thirty-one thousand five hundred twenty-one) is an odd 6-digit number. It is a composite number with 8 divisors, and factors as 13 × 67 × 151. Written other ways, in hexadecimal, 0x201C1.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 30
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 125,131
- Recamán's sequence
- a(229,330) = 131,521
- Square (n²)
- 17,297,773,441
- Cube (n³)
- 2,275,020,460,733,761
- Divisor count
- 8
- σ(n) — sum of divisors
- 144,704
- φ(n) — Euler's totient
- 118,800
- Sum of prime factors
- 231
Primality
Prime factorization: 13 × 67 × 151
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,521 = [362; (1, 1, 1, 12, 1, 1, 11, 2, 1, 2, 4, 45, 9, 1, 1, 1, 5, 1, 1, 5, 5, 1, 6, 2, …)]
Representations
- In words
- one hundred thirty-one thousand five hundred twenty-one
- Ordinal
- 131521st
- Binary
- 100000000111000001
- Octal
- 400701
- Hexadecimal
- 0x201C1
- Base64
- AgHB
- One's complement
- 4,294,835,774 (32-bit)
- Scientific notation
- 1.31521 × 10⁵
- As a duration
- 131,521 s = 1 day, 12 hours, 32 minutes, 1 second
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλαφκαʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋰·𝋡
- Chinese
- 一十三萬一千五百二十一
- Chinese (financial)
- 壹拾參萬壹仟伍佰貳拾壹
Also seen as
UTF-8 encoding: F0 A0 87 81 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.193.
- Address
- 0.2.1.193
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.193
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 131,521 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 131521 first appears in π at position 435,274 of the decimal expansion (the 435,274ordinal-suffix:th 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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.