138,531
138,531 is a composite number, odd.
138,531 (one hundred thirty-eight thousand five hundred thirty-one) is an odd 6-digit number. It is a composite number with 8 divisors, and factors as 3 × 61 × 757. Written other ways, in hexadecimal, 0x21D23.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 21
- Digit product
- 360
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 135,831
- Recamán's sequence
- a(491,765) = 138,531
- Square (n²)
- 19,190,837,961
- Cube (n³)
- 2,658,525,973,575,291
- Divisor count
- 8
- σ(n) — sum of divisors
- 187,984
- φ(n) — Euler's totient
- 90,720
- Sum of prime factors
- 821
Primality
Prime factorization: 3 × 61 × 757
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,531 = [372; (5, 15, 1, 56, 3, 10, 3, 3, 3, 4, 9, 1, 4, 1, 3, 1, 1, 4, 1, 2, 5, 1, 9, 12, …)]
Period length 48 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand five hundred thirty-one
- Ordinal
- 138531st
- Binary
- 100001110100100011
- Octal
- 416443
- Hexadecimal
- 0x21D23
- Base64
- Ah0j
- One's complement
- 4,294,828,764 (32-bit)
- Scientific notation
- 1.38531 × 10⁵
- As a duration
- 138,531 s = 1 day, 14 hours, 28 minutes, 51 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρληφλαʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋦·𝋫
- Chinese
- 一十三萬八千五百三十一
- Chinese (financial)
- 壹拾參萬捌仟伍佰參拾壹
Also seen as
UTF-8 encoding: F0 A1 B4 A3 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.35.
- Address
- 0.2.29.35
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.35
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 138,531 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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.