131,138
131,138 is a composite number, even.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 72
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 831,131
- Square (n²)
- 17,197,175,044
- Cube (n³)
- 2,255,203,140,920,072
- Divisor count
- 32
- σ(n) — sum of divisors
- 259,200
- φ(n) — Euler's totient
- 48,384
- Sum of prime factors
- 74
Primality
Prime factorization: 2 × 7 × 17 × 19 × 29
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,138 = [362; (7, 1, 2, 2, 1, 2, 6, 1, 1, 1, 20, 1, 1, 1, 6, 2, 1, 2, 2, 1, 7, 724)]
Period length 22 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-one thousand one hundred thirty-eight
- Ordinal
- 131138th
- Binary
- 100000000001000010
- Octal
- 400102
- Hexadecimal
- 0x20042
- Base64
- AgBC
- One's complement
- 4,294,836,157 (32-bit)
- Scientific notation
- 1.31138 × 10⁵
- As a duration
- 131,138 s = 1 day, 12 hours, 25 minutes, 38 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαρληʹ
- Mayan (base 20)
- 𝋰·𝋧·𝋰·𝋲
- Chinese
- 一十三萬一千一百三十八
- Chinese (financial)
- 壹拾參萬壹仟壹佰參拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131138, here are decompositions:
- 37 + 131101 = 131138
- 67 + 131071 = 131138
- 79 + 131059 = 131138
- 97 + 131041 = 131138
- 127 + 131011 = 131138
- 151 + 130987 = 131138
- 157 + 130981 = 131138
- 181 + 130957 = 131138
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 81 82 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.0.66.
- Address
- 0.2.0.66
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.0.66
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 131,138 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 131138 first appears in π at position 32,273 of the decimal expansion (the 32,273ordinal-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.