131,666
131,666 is a composite number, even.
131,666 (one hundred thirty-one thousand six hundred sixty-six) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 43 × 1,531. Written other ways, in hexadecimal, 0x20252.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 648
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 666,131
- Recamán's sequence
- a(229,040) = 131,666
- Square (n²)
- 17,335,935,556
- Cube (n³)
- 2,282,553,290,916,296
- Divisor count
- 8
- σ(n) — sum of divisors
- 202,224
- φ(n) — Euler's totient
- 64,260
- Sum of prime factors
- 1,576
Primality
Prime factorization: 2 × 43 × 1531
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,666 = [362; (1, 6, 21, 4, 1, 22, 1, 1, 1, 1, 4, 4, 1, 8, 2, 1, 1, 1, 4, 1, 2, 28, 1, 2, …)]
Representations
- In words
- one hundred thirty-one thousand six hundred sixty-six
- Ordinal
- 131666th
- Binary
- 100000001001010010
- Octal
- 401122
- Hexadecimal
- 0x20252
- Base64
- AgJS
- One's complement
- 4,294,835,629 (32-bit)
- Scientific notation
- 1.31666 × 10⁵
- As a duration
- 131,666 s = 1 day, 12 hours, 34 minutes, 26 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαχξϛʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋣·𝋦
- Chinese
- 一十三萬一千六百六十六
- Chinese (financial)
- 壹拾參萬壹仟陸佰陸拾陸
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131666, here are decompositions:
- 229 + 131437 = 131666
- 349 + 131317 = 131666
- 373 + 131293 = 131666
- 463 + 131203 = 131666
- 523 + 131143 = 131666
- 607 + 131059 = 131666
- 643 + 131023 = 131666
- 709 + 130957 = 131666
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 89 92 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.2.82.
- Address
- 0.2.2.82
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.2.82
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 131,666 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 131666 first appears in π at position 800,608 of the decimal expansion (the 800,608ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.