Live analysis
21,361
21,361 is a composite number, odd.
This number doesn't have a permanent NumberWiki page yet — what you see below is computed live.
Pages get added to the permanent index when they're notable (years, primes, curated, etc.).
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 13
- Digit product
- 36
- Digital root
- 4
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 16,312
- Recamán's sequence
- a(41,117) = 21,361
- Square (n²)
- 456,292,321
- Cube (n³)
- 9,746,860,268,881
- Divisor count
- 4
- σ(n) — sum of divisors
- 21,924
- φ(n) — Euler's totient
- 20,800
- Sum of prime factors
- 562
Primality
Prime factorization: 41 × 521
Divisors & multiples
Aliquot sum (sum of proper divisors):
563
First multiples
21,361
·
42,722
(double)
·
64,083
·
85,444
·
106,805
·
128,166
·
149,527
·
170,888
·
192,249
·
213,610
Sums & aliquot sequence
As a sum of two squares:
25² + 144² = 56² + 135²
As consecutive integers:
10,680 + 10,681
501 + 502 + … + 541
220 + 221 + … + 301
Aliquot sequence:
21,361 → 563 → 1 → 0
— terminates at zero
Representations
- In words
- twenty-one thousand three hundred sixty-one
- Ordinal
- 21361st
- Binary
- 101001101110001
- Octal
- 51561
- Hexadecimal
- 0x5371
- Base64
- U3E=
- One's complement
- 44,174 (16-bit)
In other bases
ternary (3)
1002022011
quaternary (4)
11031301
quinary (5)
1140421
senary (6)
242521
septenary (7)
116164
nonary (9)
32264
undecimal (11)
1505a
duodecimal (12)
10441
tridecimal (13)
9952
tetradecimal (14)
7adb
pentadecimal (15)
64e1
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵κατξαʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋨·𝋡
- Chinese
- 二萬一千三百六十一
- Chinese (financial)
- 貳萬壹仟參佰陸拾壹
In other modern scripts
Eastern Arabic
٢١٣٦١
Devanagari
२१३६१
Bengali
২১৩৬১
Tamil
௨௧௩௬௧
Thai
๒๑๓๖๑
Tibetan
༢༡༣༦༡
Khmer
២១៣៦១
Lao
໒໑໓໖໑
Burmese
၂၁၃၆၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,361 = 3
- e — Euler's number (e)
- Digit 21,361 = 3
- φ — Golden ratio (φ)
- Digit 21,361 = 5
- √2 — Pythagoras's (√2)
- Digit 21,361 = 2
- ln 2 — Natural log of 2
- Digit 21,361 = 1
- γ — Euler-Mascheroni (γ)
- Digit 21,361 = 2
Also seen as
Unicode codepoint
危
CJK Unified Ideograph-5371
U+5371
Other letter (Lo)
UTF-8 encoding: E5 8D B1 (3 bytes).
Hex color
#005371
RGB(0, 83, 113)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.113.
- Address
- 0.0.83.113
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.113
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 21361 first appears in π at position 112,633 of the decimal expansion (the 112,633ordinal-suffix:rd 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.