Number
21,313
21,313 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 10
- Digit product
- 18
- Digital root
- 1
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 31,312
- Recamán's sequence
- a(41,213) = 21,313
- Square (n²)
- 454,243,969
- Cube (n³)
- 9,681,301,711,297
- Divisor count
- 2
- σ(n) — sum of divisors
- 21,314
- φ(n) — Euler's totient
- 21,312
Primality
21,313 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
21,313
·
42,626
(double)
·
63,939
·
85,252
·
106,565
·
127,878
·
149,191
·
170,504
·
191,817
·
213,130
Sums & aliquot sequence
As a sum of two squares:
72² + 127²
As consecutive integers:
10,656 + 10,657
Representations
- In words
- twenty-one thousand three hundred thirteen
- Ordinal
- 21313th
- Binary
- 101001101000001
- Octal
- 51501
- Hexadecimal
- 0x5341
- Base64
- U0E=
- One's complement
- 44,222 (16-bit)
In other bases
ternary (3)
1002020101
quaternary (4)
11031001
quinary (5)
1140223
senary (6)
242401
septenary (7)
116065
nonary (9)
32211
undecimal (11)
15016
duodecimal (12)
10401
tridecimal (13)
9916
tetradecimal (14)
7aa5
pentadecimal (15)
64ad
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵κατιγʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋥·𝋭
- Chinese
- 二萬一千三百一十三
- Chinese (financial)
- 貳萬壹仟參佰壹拾參
In other modern scripts
Eastern Arabic
٢١٣١٣
Devanagari
२१३१३
Bengali
২১৩১৩
Tamil
௨௧௩௧௩
Thai
๒๑๓๑๓
Tibetan
༢༡༣༡༣
Khmer
២១៣១៣
Lao
໒໑໓໑໓
Burmese
၂၁၃၁၃
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,313 = 8
- e — Euler's number (e)
- Digit 21,313 = 3
- φ — Golden ratio (φ)
- Digit 21,313 = 3
- √2 — Pythagoras's (√2)
- Digit 21,313 = 1
- ln 2 — Natural log of 2
- Digit 21,313 = 9
- γ — Euler-Mascheroni (γ)
- Digit 21,313 = 8
Also seen as
Prime neighborhood
Unicode codepoint
十
CJK Unified Ideograph-5341
U+5341
Other letter (Lo)
UTF-8 encoding: E5 8D 81 (3 bytes).
Hex color
#005341
RGB(0, 83, 65)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.65.
- Address
- 0.0.83.65
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.65
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 21313 first appears in π at position 14,955 of the decimal expansion (the 14,955ordinal-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.