20,231
20,231 is a prime, odd.
20,231 (twenty thousand two hundred thirty-one) is an odd 5-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x4F07.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 8
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 13,202
- Recamán's sequence
- a(86,754) = 20,231
- Square (n²)
- 409,293,361
- Cube (n³)
- 8,280,413,986,391
- Divisor count
- 2
- σ(n) — sum of divisors
- 20,232
- φ(n) — Euler's totient
- 20,230
Primality
20,231 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√20,231 = [142; (4, 4, 7, 1, 8, 3, 2, 1, 4, 8, 6, 2, 40, 5, 1, 1, 1, 56, 4, 21, 1, 1, 1, 2, …)]
Representations
- In words
- twenty thousand two hundred thirty-one
- Ordinal
- 20231st
- Binary
- 100111100000111
- Octal
- 47407
- Hexadecimal
- 0x4F07
- Base64
- Twc=
- One's complement
- 45,304 (16-bit)
- Scientific notation
- 2.0231 × 10⁴
- As a duration
- 20,231 s = 5 hours, 37 minutes, 11 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓍢𓍢𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵κσλαʹ
- Mayan (base 20)
- 𝋢·𝋪·𝋫·𝋫
- Chinese
- 二萬零二百三十一
- Chinese (financial)
- 貳萬零貳佰參拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,231 = 4
- e — Euler's number (e)
- Digit 20,231 = 8
- φ — Golden ratio (φ)
- Digit 20,231 = 8
- √2 — Pythagoras's (√2)
- Digit 20,231 = 4
- ln 2 — Natural log of 2
- Digit 20,231 = 3
- γ — Euler-Mascheroni (γ)
- Digit 20,231 = 1
Also seen as
UTF-8 encoding: E4 BC 87 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.79.7.
- Address
- 0.0.79.7
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.79.7
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 20231 first appears in π at position 53,135 of the decimal expansion (the 53,135ordinal-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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.