21,472
21,472 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 16
- Digit product
- 112
- Digital root
- 7
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 27,412
- Recamán's sequence
- a(40,895) = 21,472
- Square (n²)
- 461,046,784
- Cube (n³)
- 9,899,596,546,048
- Divisor count
- 24
- σ(n) — sum of divisors
- 46,872
- φ(n) — Euler's totient
- 9,600
- Sum of prime factors
- 82
Primality
Prime factorization: 2 5 × 11 × 61
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand four hundred seventy-two
- Ordinal
- 21472nd
- Binary
- 101001111100000
- Octal
- 51740
- Hexadecimal
- 0x53E0
- Base64
- U+A=
- One's complement
- 44,063 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵καυοβʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋭·𝋬
- Chinese
- 二萬一千四百七十二
- Chinese (financial)
- 貳萬壹仟肆佰柒拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,472 = 1
- e — Euler's number (e)
- Digit 21,472 = 7
- φ — Golden ratio (φ)
- Digit 21,472 = 1
- √2 — Pythagoras's (√2)
- Digit 21,472 = 5
- ln 2 — Natural log of 2
- Digit 21,472 = 3
- γ — Euler-Mascheroni (γ)
- Digit 21,472 = 1
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21472, here are decompositions:
- 5 + 21467 = 21472
- 53 + 21419 = 21472
- 71 + 21401 = 21472
- 89 + 21383 = 21472
- 131 + 21341 = 21472
- 149 + 21323 = 21472
- 251 + 21221 = 21472
- 281 + 21191 = 21472
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8F A0 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.224.
- Address
- 0.0.83.224
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.224
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21472 first appears in π at position 4,560 of the decimal expansion (the 4,560ordinal-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.