Number

72,221

72,221 is a prime, odd.

Arithmetic Number Chen Prime Deficient Number Emirp Evil Number Prime Pythagorean Prime Recamán's Sequence Sexy Prime Squarefree Twin Prime

Properties

Parity: Odd
Digit count: 5
Digit sum: 14
Digit product: 56
Digital root: 5
Palindrome: No
Bit width: 17 bits
Reversed: 12,227
Recamán's sequence: a(127,157) = 72,221
Square (n²): 5,215,872,841
Cube (n³): 376,695,552,449,861
Divisor count: 2
σ(n) — sum of divisors: 72,222
φ(n) — Euler's totient: 72,220

Primality

72,221 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 72221

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 72,221)

1 × 72221

First multiples

72,221 · 144,442 (double) · 216,663 · 288,884 · 361,105 · 433,326 · 505,547 · 577,768 · 649,989 · 722,210

Sums & aliquot sequence

As a sum of two squares: 139² + 230²

As consecutive integers: 36,110 + 36,111

Representations

In words: seventy-two thousand two hundred twenty-one
Ordinal: 72221st
Binary: 10001101000011101
Octal: 215035
Hexadecimal: 0x11A1D
Base64: ARod
One's complement: 4,294,895,074 (32-bit)

In other bases

ternary (3) 10200001212

quaternary (4) 101220131

quinary (5) 4302341

senary (6) 1314205

septenary (7) 420362

nonary (9) 120055

undecimal (11) 4a296

duodecimal (12) 35965

tridecimal (13) 26b46

tetradecimal (14) 1c469

pentadecimal (15) 165eb

Historical numeral systems

Babylonian (base 60): 𒌋𒌋 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓎆𓎆𓏺
Greek (Milesian): ͵οβσκαʹ
Mayan (base 20): 𝋩·𝋠·𝋫·𝋡
Chinese: 七萬二千二百二十一
Chinese (financial): 柒萬貳仟貳佰貳拾壹

In other modern scripts

Eastern Arabic ٧٢٢٢١ Devanagari ७२२२१ Bengali ৭২২২১ Tamil ௭௨௨௨௧ Thai ๗๒๒๒๑ Tibetan ༧༢༢༢༡ Khmer ៧២២២១ Lao ໗໒໒໒໑ Burmese ၇၂၂၂၁

Digit at this position in famous constants

π — Pi (π): Digit 72,221 = 1
e — Euler's number (e): Digit 72,221 = 3
φ — Golden ratio (φ): Digit 72,221 = 6
√2 — Pythagoras's (√2): Digit 72,221 = 5
ln 2 — Natural log of 2: Digit 72,221 = 0
γ — Euler-Mascheroni (γ): Digit 72,221 = 4

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 72,211 (gap of 10)
Next prime: 72,223 (gap of 2)

Pair status: twin with 72223.

Unicode codepoint

𑨝

Zanabazar Square Letter Na

U+11A1D

Other letter (Lo)

UTF-8 encoding: F0 91 A8 9D (4 bytes).

Lookup U+11A1D on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#011A1D

RGB(1, 26, 29)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.1.26.29.

Address: 0.1.26.29
Class: reserved
IPv4-mapped IPv6: ::ffff:0.1.26.29

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

Position in π

The digit sequence 72221 first appears in π at position 49,225 of the decimal expansion (the 49,225ordinal-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 72221 on Pi Search ↗