Number

82,021

82,021 is a prime, odd.

82,021 (eighty-two thousand twenty-one) is an odd 5-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x14065.

Arithmetic Number Cube-Free Deficient Number Evil Number Prime Pythagorean Prime Recamán's Sequence Squarefree

Interestingness

★ ★ ★ ★ ☆

6 notable facts · grade B

82,009 82,010 82,011 82,012 82,013 82,014 82,015 82,016 82,017 82,018 82,019 82,020 82,021 82,022 82,023 82,024 82,025 82,026 82,027 82,028 82,029 82,030 82,031 82,032 82,033

less more

Properties

Parity: Odd
Digit count: 5
Digit sum: 13
Digit product: 0
Digital root: 4
Palindrome: No
Bit width: 17 bits
Reversed: 12,028
Recamán's sequence: a(23,761) = 82,021
Square (n²): 6,727,444,441
Cube (n³): 551,791,720,495,261
Divisor count: 2
σ(n) — sum of divisors: 82,022
φ(n) — Euler's totient: 82,020

Primality

82,021 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 82021

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 82,021)

1 × 82021

First multiples

82,021 · 164,042 (double) · 246,063 · 328,084 · 410,105 · 492,126 · 574,147 · 656,168 · 738,189 · 820,210

Sums & aliquot sequence

As a sum of two squares: 15² + 286²

As consecutive integers: 41,010 + 41,011

Continued fraction of √n

√82,021 = [286; (2, 1, 1, 5, 5, 2, 1, 1, 1, 1, 2, 7, 1, 11, 3, 3, 1, 3, 3, 2, 2, 5, 1, 7, …)]

Representations

In words: eighty-two thousand twenty-one
Ordinal: 82021st
Binary: 10100000001100101
Octal: 240145
Hexadecimal: 0x14065
Base64: AUBl
One's complement: 4,294,885,274 (32-bit)
Scientific notation: 8.2021 × 10⁴
As a duration: 82,021 s = 22 hours, 47 minutes, 1 second

In other bases

ternary (3) 11011111211

quaternary (4) 110001211

quinary (5) 10111041

senary (6) 1431421

septenary (7) 461062

nonary (9) 134454

undecimal (11) 56695

duodecimal (12) 3b571

tridecimal (13) 2b444

tetradecimal (14) 21c69

pentadecimal (15) 19481

As an angle

82,021° = 227 × 360° + 301°

301° ≈ 5.253 rad

Compass bearing: WNW (west-northwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓎆𓎆𓏺
Greek (Milesian): ͵πβκαʹ
Mayan (base 20): 𝋪·𝋥·𝋡·𝋡
Chinese: 八萬二千零二十一
Chinese (financial): 捌萬貳仟零貳拾壹

In other modern scripts

Eastern Arabic ٨٢٠٢١ Devanagari ८२०२१ Bengali ৮২০২১ Tamil ௮௨௦௨௧ Thai ๘๒๐๒๑ Tibetan ༨༢༠༢༡ Khmer ៨២០២១ Lao ໘໒໐໒໑ Burmese ၈၂၀၂၁

Digit at this position in famous constants

π — Pi (π): Digit 82,021 = 4
e — Euler's number (e): Digit 82,021 = 7
φ — Golden ratio (φ): Digit 82,021 = 8
√2 — Pythagoras's (√2): Digit 82,021 = 9
ln 2 — Natural log of 2: Digit 82,021 = 4
γ — Euler-Mascheroni (γ): Digit 82,021 = 2

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 82,013 (gap of 8)
Next prime: 82,031 (gap of 10)

Unicode codepoint

𔁥

Egyptian Hieroglyph-14065

U+14065

Other letter (Lo)

UTF-8 encoding: F0 94 81 A5 (4 bytes).

Lookup U+14065 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#014065

RGB(1, 64, 101)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.1.64.101.

Address: 0.1.64.101
Class: reserved
IPv4-mapped IPv6: ::ffff:0.1.64.101

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Position in π

The digit sequence 82021 first appears in π at position 215,517 of the decimal expansion (the 215,517ordinal-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.

Look up 82021 on Pi Search ↗