Number
21,713
21,713 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
- 31,712
- Recamán's sequence
- a(40,413) = 21,713
- Square (n²)
- 471,454,369
- Cube (n³)
- 10,236,688,714,097
- Divisor count
- 2
- σ(n) — sum of divisors
- 21,714
- φ(n) — Euler's totient
- 21,712
Primality
21,713 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
21,713
·
43,426
(double)
·
65,139
·
86,852
·
108,565
·
130,278
·
151,991
·
173,704
·
195,417
·
217,130
Sums & aliquot sequence
As a sum of two squares:
73² + 128²
As consecutive integers:
10,856 + 10,857
Representations
- In words
- twenty-one thousand seven hundred thirteen
- Ordinal
- 21713th
- Binary
- 101010011010001
- Octal
- 52321
- Hexadecimal
- 0x54D1
- Base64
- VNE=
- One's complement
- 43,822 (16-bit)
In other bases
ternary (3)
1002210012
quaternary (4)
11103101
quinary (5)
1143323
senary (6)
244305
septenary (7)
120206
nonary (9)
32705
undecimal (11)
1534a
duodecimal (12)
10695
tridecimal (13)
9b63
tetradecimal (14)
7cad
pentadecimal (15)
6678
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹 𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵καψιγʹ
- Mayan (base 20)
- 𝋢·𝋮·𝋥·𝋭
- Chinese
- 二萬一千七百一十三
- Chinese (financial)
- 貳萬壹仟柒佰壹拾參
In other modern scripts
Eastern Arabic
٢١٧١٣
Devanagari
२१७१३
Bengali
২১৭১৩
Tamil
௨௧௭௧௩
Thai
๒๑๗๑๓
Tibetan
༢༡༧༡༣
Khmer
២១៧១៣
Lao
໒໑໗໑໓
Burmese
၂၁၇၁၃
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,713 = 2
- e — Euler's number (e)
- Digit 21,713 = 2
- φ — Golden ratio (φ)
- Digit 21,713 = 6
- √2 — Pythagoras's (√2)
- Digit 21,713 = 7
- ln 2 — Natural log of 2
- Digit 21,713 = 9
- γ — Euler-Mascheroni (γ)
- Digit 21,713 = 1
Also seen as
Unicode codepoint
哑
CJK Unified Ideograph-54D1
U+54D1
Other letter (Lo)
UTF-8 encoding: E5 93 91 (3 bytes).
Hex color
#0054D1
RGB(0, 84, 209)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.84.209.
- Address
- 0.0.84.209
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.84.209
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 21713 first appears in π at position 106,379 of the decimal expansion (the 106,379ordinal-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.