Number
21,139
21,139 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 16
- Digit product
- 54
- Digital root
- 7
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 93,112
- Recamán's sequence
- a(41,561) = 21,139
- Square (n²)
- 446,857,321
- Cube (n³)
- 9,446,116,908,619
- Divisor count
- 2
- σ(n) — sum of divisors
- 21,140
- φ(n) — Euler's totient
- 21,138
Primality
21,139 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
21,139
·
42,278
(double)
·
63,417
·
84,556
·
105,695
·
126,834
·
147,973
·
169,112
·
190,251
·
211,390
Sums & aliquot sequence
As consecutive integers:
10,569 + 10,570
Representations
- In words
- twenty-one thousand one hundred thirty-nine
- Ordinal
- 21139th
- Binary
- 101001010010011
- Octal
- 51223
- Hexadecimal
- 0x5293
- Base64
- UpM=
- One's complement
- 44,396 (16-bit)
In other bases
ternary (3)
1001222221
quaternary (4)
11022103
quinary (5)
1134024
senary (6)
241511
septenary (7)
115426
nonary (9)
31887
undecimal (11)
14978
duodecimal (12)
10297
tridecimal (13)
9811
tetradecimal (14)
79bd
pentadecimal (15)
63e4
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵καρλθʹ
- Mayan (base 20)
- 𝋢·𝋬·𝋰·𝋳
- Chinese
- 二萬一千一百三十九
- Chinese (financial)
- 貳萬壹仟壹佰參拾玖
In other modern scripts
Eastern Arabic
٢١١٣٩
Devanagari
२११३९
Bengali
২১১৩৯
Tamil
௨௧௧௩௯
Thai
๒๑๑๓๙
Tibetan
༢༡༡༣༩
Khmer
២១១៣៩
Lao
໒໑໑໓໙
Burmese
၂၁၁၃၉
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,139 = 7
- e — Euler's number (e)
- Digit 21,139 = 7
- φ — Golden ratio (φ)
- Digit 21,139 = 1
- √2 — Pythagoras's (√2)
- Digit 21,139 = 2
- ln 2 — Natural log of 2
- Digit 21,139 = 1
- γ — Euler-Mascheroni (γ)
- Digit 21,139 = 4
Also seen as
Prime neighborhood
Unicode codepoint
劓
CJK Unified Ideograph-5293
U+5293
Other letter (Lo)
UTF-8 encoding: E5 8A 93 (3 bytes).
Hex color
#005293
RGB(0, 82, 147)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.147.
- Address
- 0.0.82.147
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.82.147
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 21139 first appears in π at position 24,335 of the decimal expansion (the 24,335ordinal-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.