131,805
131,805 is a composite number, odd.
131,805 (one hundred thirty-one thousand eight hundred five) is an odd 6-digit number. It is a composite number with 24 divisors, and factors as 3² × 5 × 29 × 101. Written other ways, in hexadecimal, 0x202DD.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 508,131
- Recamán's sequence
- a(228,762) = 131,805
- Square (n²)
- 17,372,558,025
- Cube (n³)
- 2,289,790,010,485,125
- Divisor count
- 24
- σ(n) — sum of divisors
- 238,680
- φ(n) — Euler's totient
- 67,200
- Sum of prime factors
- 141
Primality
Prime factorization: 3 2 × 5 × 29 × 101
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,805 = [363; (20, 5, 1, 19, 2, 1, 80, 181, 1, 1, 19, 1, 2, 80, 2, 1, 19, 1, 1, 181, 80, 1, 2, 19, …)]
Period length 28 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-one thousand eight hundred five
- Ordinal
- 131805th
- Binary
- 100000001011011101
- Octal
- 401335
- Hexadecimal
- 0x202DD
- Base64
- AgLd
- One's complement
- 4,294,835,490 (32-bit)
- Scientific notation
- 1.31805 × 10⁵
- As a duration
- 131,805 s = 1 day, 12 hours, 36 minutes, 45 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαωεʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋪·𝋥
- Chinese
- 一十三萬一千八百零五
- Chinese (financial)
- 壹拾參萬壹仟捌佰零伍
Also seen as
UTF-8 encoding: F0 A0 8B 9D (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.2.221.
- Address
- 0.2.2.221
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.2.221
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 131,805 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°.