Number

31,957

31,957 is a prime, odd.

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

Properties

Parity: Odd
Digit count: 5
Digit sum: 25
Digit product: 945
Digital root: 7
Palindrome: No
Bit width: 15 bits
Reversed: 75,913
Recamán's sequence: a(13,421) = 31,957
Square (n²): 1,021,249,849
Cube (n³): 32,636,081,424,493
Divisor count: 2
σ(n) — sum of divisors: 31,958
φ(n) — Euler's totient: 31,956

Primality

31,957 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 31957

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 31,957)

1 × 31957

First multiples

31,957 · 63,914 (double) · 95,871 · 127,828 · 159,785 · 191,742 · 223,699 · 255,656 · 287,613 · 319,570

Sums & aliquot sequence

As a sum of two squares: 41² + 174²

As consecutive integers: 15,978 + 15,979

Representations

In words: thirty-one thousand nine hundred fifty-seven
Ordinal: 31957th
Binary: 111110011010101
Octal: 76325
Hexadecimal: 0x7CD5
Base64: fNU=
One's complement: 33,578 (16-bit)

In other bases

ternary (3) 1121211121

quaternary (4) 13303111

quinary (5) 2010312

senary (6) 403541

septenary (7) 162112

nonary (9) 47747

undecimal (11) 22012

duodecimal (12) 165b1

tridecimal (13) 11713

tetradecimal (14) b909

pentadecimal (15) 9707

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵λαϡνζʹ
Mayan (base 20): 𝋣·𝋳·𝋱·𝋱
Chinese: 三萬一千九百五十七
Chinese (financial): 參萬壹仟玖佰伍拾柒

In other modern scripts

Eastern Arabic ٣١٩٥٧ Devanagari ३१९५७ Bengali ৩১৯৫৭ Tamil ௩௧௯௫௭ Thai ๓๑๙๕๗ Tibetan ༣༡༩༥༧ Khmer ៣១៩៥៧ Lao ໓໑໙໕໗ Burmese ၃၁၉၅၇

Digit at this position in famous constants

π — Pi (π): Digit 31,957 = 3
e — Euler's number (e): Digit 31,957 = 6
φ — Golden ratio (φ): Digit 31,957 = 0
√2 — Pythagoras's (√2): Digit 31,957 = 3
ln 2 — Natural log of 2: Digit 31,957 = 1
γ — Euler-Mascheroni (γ): Digit 31,957 = 9

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 31,907 (gap of 50)
Next prime: 31,963 (gap of 6)

Pair status: sexy with 31963.

Unicode codepoint

糕

CJK Unified Ideograph-7Cd5

U+7CD5

Other letter (Lo)

UTF-8 encoding: E7 B3 95 (3 bytes).

Lookup U+7CD5 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#007CD5

RGB(0, 124, 213)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.124.213.

Address: 0.0.124.213
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.124.213

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

Position in π

The digit sequence 31957 first appears in π at position 40,818 of the decimal expansion (the 40,818ordinal-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 31957 on Pi Search ↗