Number

31,223

31,223 is a prime, odd.

Arithmetic Number Cousin Prime Deficient Number Emirp Evil Number Prime Recamán's Sequence Squarefree

Properties

Parity: Odd
Digit count: 5
Digit sum: 11
Digit product: 36
Digital root: 2
Palindrome: No
Bit width: 15 bits
Reversed: 32,213
Recamán's sequence: a(31,217) = 31,223
Square (n²): 974,875,729
Cube (n³): 30,438,544,886,567
Divisor count: 2
σ(n) — sum of divisors: 31,224
φ(n) — Euler's totient: 31,222

Primality

31,223 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 31223

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 31,223)

1 × 31223

First multiples

31,223 · 62,446 (double) · 93,669 · 124,892 · 156,115 · 187,338 · 218,561 · 249,784 · 281,007 · 312,230

Sums & aliquot sequence

As consecutive integers: 15,611 + 15,612

Representations

In words: thirty-one thousand two hundred twenty-three
Ordinal: 31223rd
Binary: 111100111110111
Octal: 74767
Hexadecimal: 0x79F7
Base64: efc=
One's complement: 34,312 (16-bit)

In other bases

ternary (3) 1120211102

quaternary (4) 13213313

quinary (5) 1444343

senary (6) 400315

septenary (7) 160013

nonary (9) 46742

undecimal (11) 21505

duodecimal (12) 1609b

tridecimal (13) 1129a

tetradecimal (14) b543

pentadecimal (15) 93b8

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋 𒌋𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓆼𓍢𓍢𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): ͵λασκγʹ
Mayan (base 20): 𝋣·𝋲·𝋡·𝋣
Chinese: 三萬一千二百二十三
Chinese (financial): 參萬壹仟貳佰貳拾參

In other modern scripts

Eastern Arabic ٣١٢٢٣ Devanagari ३१२२३ Bengali ৩১২২৩ Tamil ௩௧௨௨௩ Thai ๓๑๒๒๓ Tibetan ༣༡༢༢༣ Khmer ៣១២២៣ Lao ໓໑໒໒໓ Burmese ၃၁၂၂၃

Digit at this position in famous constants

π — Pi (π): Digit 31,223 = 4
e — Euler's number (e): Digit 31,223 = 4
φ — Golden ratio (φ): Digit 31,223 = 7
√2 — Pythagoras's (√2): Digit 31,223 = 3
ln 2 — Natural log of 2: Digit 31,223 = 2
γ — Euler-Mascheroni (γ): Digit 31,223 = 2

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 31,219 (gap of 4)
Next prime: 31,231 (gap of 8)

Pair status: cousin with 31219.

Unicode codepoint

秷

CJK Unified Ideograph-79F7

U+79F7

Other letter (Lo)

UTF-8 encoding: E7 A7 B7 (3 bytes).

Lookup U+79F7 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0079F7

RGB(0, 121, 247)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.121.247.

Address: 0.0.121.247
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.121.247

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

Position in π

The digit sequence 31223 first appears in π at position 74,838 of the decimal expansion (the 74,838ordinal-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 31223 on Pi Search ↗