Number
21,317
21,317 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 14
- Digit product
- 42
- Digital root
- 5
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 71,312
- Recamán's sequence
- a(41,205) = 21,317
- Square (n²)
- 454,414,489
- Cube (n³)
- 9,686,753,662,013
- Divisor count
- 2
- σ(n) — sum of divisors
- 21,318
- φ(n) — Euler's totient
- 21,316
Primality
21,317 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
21,317
·
42,634
(double)
·
63,951
·
85,268
·
106,585
·
127,902
·
149,219
·
170,536
·
191,853
·
213,170
Sums & aliquot sequence
As a sum of two squares:
1² + 146²
As consecutive integers:
10,658 + 10,659
Representations
- In words
- twenty-one thousand three hundred seventeen
- Ordinal
- 21317th
- Binary
- 101001101000101
- Octal
- 51505
- Hexadecimal
- 0x5345
- Base64
- U0U=
- One's complement
- 44,218 (16-bit)
In other bases
ternary (3)
1002020112
quaternary (4)
11031011
quinary (5)
1140232
senary (6)
242405
septenary (7)
116102
nonary (9)
32215
undecimal (11)
1501a
duodecimal (12)
10405
tridecimal (13)
991a
tetradecimal (14)
7aa9
pentadecimal (15)
64b2
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κατιζʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋥·𝋱
- Chinese
- 二萬一千三百一十七
- Chinese (financial)
- 貳萬壹仟參佰壹拾柒
In other modern scripts
Eastern Arabic
٢١٣١٧
Devanagari
२१३१७
Bengali
২১৩১৭
Tamil
௨௧௩௧௭
Thai
๒๑๓๑๗
Tibetan
༢༡༣༡༧
Khmer
២១៣១៧
Lao
໒໑໓໑໗
Burmese
၂၁၃၁၇
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,317 = 3
- e — Euler's number (e)
- Digit 21,317 = 1
- φ — Golden ratio (φ)
- Digit 21,317 = 4
- √2 — Pythagoras's (√2)
- Digit 21,317 = 7
- ln 2 — Natural log of 2
- Digit 21,317 = 0
- γ — Euler-Mascheroni (γ)
- Digit 21,317 = 2
Also seen as
Prime neighborhood
Unicode codepoint
卅
CJK Unified Ideograph-5345
U+5345
Other letter (Lo)
UTF-8 encoding: E5 8D 85 (3 bytes).
Hex color
#005345
RGB(0, 83, 69)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.69.
- Address
- 0.0.83.69
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.69
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 21317 first appears in π at position 4,565 of the decimal expansion (the 4,565ordinal-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.