Live analysis
13,821
13,821 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
- 15
- Digit product
- 48
- Digital root
- 6
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 12,831
- Recamán's sequence
- a(21,074) = 13,821
- Square (n²)
- 191,020,041
- Cube (n³)
- 2,640,087,986,661
- Divisor count
- 8
- σ(n) — sum of divisors
- 19,584
- φ(n) — Euler's totient
- 8,640
- Sum of prime factors
- 291
Primality
Prime factorization: 3 × 17 × 271
Divisors & multiples
Aliquot sum (sum of proper divisors):
5,763
First multiples
13,821
·
27,642
(double)
·
41,463
·
55,284
·
69,105
·
82,926
·
96,747
·
110,568
·
124,389
·
138,210
Sums & aliquot sequence
As consecutive integers:
6,910 + 6,911
4,606 + 4,607 + 4,608
2,301 + 2,302 + 2,303 + 2,304 + 2,305 + 2,306
805 + 806 + … + 821
Aliquot sequence:
13,821 → 5,763 → 2,445 → 1,491 → 813 → 275 → 97 → 1 → 0
— terminates at zero
Representations
- In words
- thirteen thousand eight hundred twenty-one
- Ordinal
- 13821st
- Binary
- 11010111111101
- Octal
- 32775
- Hexadecimal
- 0x35FD
- Base64
- Nf0=
- One's complement
- 51,714 (16-bit)
In other bases
ternary (3)
200221220
quaternary (4)
3113331
quinary (5)
420241
senary (6)
143553
septenary (7)
55203
nonary (9)
20856
undecimal (11)
a425
duodecimal (12)
7bb9
tridecimal (13)
63a2
tetradecimal (14)
5073
pentadecimal (15)
4166
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ιγωκαʹ
- Mayan (base 20)
- 𝋡·𝋮·𝋫·𝋡
- Chinese
- 一萬三千八百二十一
- Chinese (financial)
- 壹萬參仟捌佰貳拾壹
In other modern scripts
Eastern Arabic
١٣٨٢١
Devanagari
१३८२१
Bengali
১৩৮২১
Tamil
௧௩௮௨௧
Thai
๑๓๘๒๑
Tibetan
༡༣༨༢༡
Khmer
១៣៨២១
Lao
໑໓໘໒໑
Burmese
၁၃၈၂၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,821 = 2
- e — Euler's number (e)
- Digit 13,821 = 1
- φ — Golden ratio (φ)
- Digit 13,821 = 1
- √2 — Pythagoras's (√2)
- Digit 13,821 = 8
- ln 2 — Natural log of 2
- Digit 13,821 = 8
- γ — Euler-Mascheroni (γ)
- Digit 13,821 = 5
Also seen as
Unicode codepoint
㗽
CJK Unified Ideograph-35Fd
U+35FD
Other letter (Lo)
UTF-8 encoding: E3 97 BD (3 bytes).
Hex color
#0035FD
RGB(0, 53, 253)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.53.253.
- Address
- 0.0.53.253
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.53.253
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 13821 first appears in π at position 67,256 of the decimal expansion (the 67,256ordinal-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.