21,248
21,248 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 17
- Digit product
- 128
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 84,212
- Recamán's sequence
- a(41,343) = 21,248
- Square (n²)
- 451,477,504
- Cube (n³)
- 9,592,994,004,992
- Divisor count
- 18
- σ(n) — sum of divisors
- 42,924
- φ(n) — Euler's totient
- 10,496
- Sum of prime factors
- 99
Primality
Prime factorization: 2 8 × 83
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand two hundred forty-eight
- Ordinal
- 21248th
- Binary
- 101001100000000
- Octal
- 51400
- Hexadecimal
- 0x5300
- Base64
- UwA=
- One's complement
- 44,287 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κασμηʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋢·𝋨
- Chinese
- 二萬一千二百四十八
- Chinese (financial)
- 貳萬壹仟貳佰肆拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,248 = 5
- e — Euler's number (e)
- Digit 21,248 = 0
- φ — Golden ratio (φ)
- Digit 21,248 = 9
- √2 — Pythagoras's (√2)
- Digit 21,248 = 1
- ln 2 — Natural log of 2
- Digit 21,248 = 9
- γ — Euler-Mascheroni (γ)
- Digit 21,248 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21248, here are decompositions:
- 37 + 21211 = 21248
- 61 + 21187 = 21248
- 79 + 21169 = 21248
- 109 + 21139 = 21248
- 127 + 21121 = 21248
- 181 + 21067 = 21248
- 229 + 21019 = 21248
- 349 + 20899 = 21248
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8C 80 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.0.
- Address
- 0.0.83.0
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.0
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21248 first appears in π at position 27,114 of the decimal expansion (the 27,114ordinal-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.