21,059
21,059 is a prime, odd.
21,059 (twenty-one thousand fifty-nine) is an odd 5-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x5243.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 95,012
- Recamán's sequence
- a(41,721) = 21,059
- Square (n²)
- 443,481,481
- Cube (n³)
- 9,339,276,508,379
- Divisor count
- 2
- σ(n) — sum of divisors
- 21,060
- φ(n) — Euler's totient
- 21,058
Primality
21,059 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√21,059 = [145; (8, 1, 1, 7, 9, 4, 2, 1, 4, 3, 4, 1, 28, 4, 1, 2, 1, 1, 1, 1, 2, 2, 3, 1, …)]
Representations
- In words
- twenty-one thousand fifty-nine
- Ordinal
- 21059th
- Binary
- 101001001000011
- Octal
- 51103
- Hexadecimal
- 0x5243
- Base64
- UkM=
- One's complement
- 44,476 (16-bit)
- Scientific notation
- 2.1059 × 10⁴
- As a duration
- 21,059 s = 5 hours, 50 minutes, 59 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κανθʹ
- Mayan (base 20)
- 𝋢·𝋬·𝋬·𝋳
- Chinese
- 二萬一千零五十九
- Chinese (financial)
- 貳萬壹仟零伍拾玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,059 = 5
- e — Euler's number (e)
- Digit 21,059 = 4
- φ — Golden ratio (φ)
- Digit 21,059 = 3
- √2 — Pythagoras's (√2)
- Digit 21,059 = 8
- ln 2 — Natural log of 2
- Digit 21,059 = 3
- γ — Euler-Mascheroni (γ)
- Digit 21,059 = 4
Also seen as
UTF-8 encoding: E5 89 83 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.67.
- Address
- 0.0.82.67
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.82.67
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21059 first appears in π at position 160,198 of the decimal expansion (the 160,198ordinal-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.