131,572
131,572 is a composite number, even.
131,572 (one hundred thirty-one thousand five hundred seventy-two) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 7 × 37 × 127. Its proper divisors sum to 140,812, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x201F4.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 19
- Digit product
- 210
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 275,131
- Recamán's sequence
- a(229,228) = 131,572
- Square (n²)
- 17,311,191,184
- Cube (n³)
- 2,277,668,046,461,248
- Divisor count
- 24
- σ(n) — sum of divisors
- 272,384
- φ(n) — Euler's totient
- 54,432
- Sum of prime factors
- 175
Primality
Prime factorization: 2 2 × 7 × 37 × 127
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,572 = [362; (1, 2, 1, 2, 6, 8, 1, 3, 1, 44, 1, 1, 4, 1, 102, 1, 4, 1, 1, 44, 1, 3, 1, 8, …)]
Period length 30 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-one thousand five hundred seventy-two
- Ordinal
- 131572nd
- Binary
- 100000000111110100
- Octal
- 400764
- Hexadecimal
- 0x201F4
- Base64
- AgH0
- One's complement
- 4,294,835,723 (32-bit)
- Scientific notation
- 1.31572 × 10⁵
- As a duration
- 131,572 s = 1 day, 12 hours, 32 minutes, 52 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρλαφοβʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋲·𝋬
- Chinese
- 一十三萬一千五百七十二
- Chinese (financial)
- 壹拾參萬壹仟伍佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131572, here are decompositions:
- 11 + 131561 = 131572
- 29 + 131543 = 131572
- 53 + 131519 = 131572
- 71 + 131501 = 131572
- 83 + 131489 = 131572
- 131 + 131441 = 131572
- 191 + 131381 = 131572
- 251 + 131321 = 131572
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 87 B4 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.244.
- Address
- 0.2.1.244
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.244
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 131,572 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.