21,055
21,055 is a composite number, odd.
21,055 (twenty-one thousand fifty-five) is an odd 5-digit number. It is a composite number with 4 divisors, and factors as 5 × 4,211. Written other ways, in hexadecimal, 0x523F.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 55,012
- Recamán's sequence
- a(41,729) = 21,055
- Square (n²)
- 443,313,025
- Cube (n³)
- 9,333,955,741,375
- Divisor count
- 4
- σ(n) — sum of divisors
- 25,272
- φ(n) — Euler's totient
- 16,840
- Sum of prime factors
- 4,216
Primality
Prime factorization: 5 × 4211
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√21,055 = [145; (9, 1, 2, 31, 1, 9, 26, 3, 1, 1, 5, 8, 2, 1, 4, 4, 5, 2, 4, 1, 4, 1, 1, 3, …)]
Period length 60 — the block in parentheses repeats forever.
Representations
- In words
- twenty-one thousand fifty-five
- Ordinal
- 21055th
- Binary
- 101001000111111
- Octal
- 51077
- Hexadecimal
- 0x523F
- Base64
- Uj8=
- One's complement
- 44,480 (16-bit)
- Scientific notation
- 2.1055 × 10⁴
- As a duration
- 21,055 s = 5 hours, 50 minutes, 55 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κανεʹ
- Mayan (base 20)
- 𝋢·𝋬·𝋬·𝋯
- Chinese
- 二萬一千零五十五
- Chinese (financial)
- 貳萬壹仟零伍拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,055 = 8
- e — Euler's number (e)
- Digit 21,055 = 4
- φ — Golden ratio (φ)
- Digit 21,055 = 9
- √2 — Pythagoras's (√2)
- Digit 21,055 = 8
- ln 2 — Natural log of 2
- Digit 21,055 = 4
- γ — Euler-Mascheroni (γ)
- Digit 21,055 = 0
Also seen as
UTF-8 encoding: E5 88 BF (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.63.
- Address
- 0.0.82.63
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.82.63
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21055 first appears in π at position 74,380 of the decimal expansion (the 74,380ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.