Number

5,081

5,081 is a prime, odd.

5,081 (five thousand eighty-one) is an odd 4-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x13D9.

Arithmetic Number Cousin Prime Cube-Free Deficient Number Evil Number Prime Pythagorean Prime Recamán's Sequence Sexy Prime Sophie Germain Prime Squarefree

Interestingness

★ ★ ★ ★ ★

9 notable facts · grade A

5,069 5,070 5,071 5,072 5,073 5,074 5,075 5,076 5,077 5,078 5,079 5,080 5,081 5,082 5,083 5,084 5,085 5,086 5,087 5,088 5,089 5,090 5,091 5,092 5,093

less more

Properties

Parity: Odd
Digit count: 4
Digit sum: 14
Digit product: 0
Digital root: 5
Palindrome: No
Bit width: 13 bits
Reversed: 1,805
Recamán's sequence: a(2,162) = 5,081
Square (n²): 25,816,561
Cube (n³): 131,173,946,441
Divisor count: 2
σ(n) — sum of divisors: 5,082
φ(n) — Euler's totient: 5,080

Primality

5,081 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 5081

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 5,081)

1 × 5081

First multiples

5,081 · 10,162 (double) · 15,243 · 20,324 · 25,405 · 30,486 · 35,567 · 40,648 · 45,729 · 50,810

Sums & aliquot sequence

As a sum of two squares: 40² + 59²

As consecutive integers: 2,540 + 2,541

Continued fraction of √n

√5,081 = [71; (3, 1, 1, 3, 1, 7, 1, 1, 1, 1, 7, 1, 3, 1, 1, 3, 142)]

Period length 17 — the block in parentheses repeats forever.

Representations

In words: five thousand eighty-one
Ordinal: 5081st
Binary: 1001111011001
Octal: 11731
Hexadecimal: 0x13D9
Base64: E9k=
One's complement: 60,454 (16-bit)
Scientific notation: 5.081 × 10³
As a duration: 5,081 s = 1 hour, 24 minutes, 41 seconds

In other bases

ternary (3) 20222012

quaternary (4) 1033121

quinary (5) 130311

senary (6) 35305

septenary (7) 20546

nonary (9) 6865

undecimal (11) 38aa

duodecimal (12) 2b35

tridecimal (13) 240b

tetradecimal (14) 1bcd

pentadecimal (15) 178b

As an angle

5,081° = 14 × 360° + 41°

41° ≈ 0.716 rad

Compass bearing: NE (northeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹 𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ͵επαʹ
Mayan (base 20): 𝋬·𝋮·𝋡
Chinese: 五千零八十一
Chinese (financial): 伍仟零捌拾壹

In other modern scripts

Eastern Arabic ٥٠٨١ Devanagari ५०८१ Bengali ৫০৮১ Tamil ௫௦௮௧ Thai ๕๐๘๑ Tibetan ༥༠༨༡ Khmer ៥០៨១ Lao ໕໐໘໑ Burmese ၅၀၈၁

Digit at this position in famous constants

π — Pi (π): Digit 5,081 = 8
e — Euler's number (e): Digit 5,081 = 5
φ — Golden ratio (φ): Digit 5,081 = 9
√2 — Pythagoras's (√2): Digit 5,081 = 7
ln 2 — Natural log of 2: Digit 5,081 = 1
γ — Euler-Mascheroni (γ): Digit 5,081 = 8

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 5,077 (gap of 4)
Next prime: 5,087 (gap of 6)

Pair status: cousin with 5077, sexy with 5087.

Unicode codepoint

Ꮩ

Cherokee Letter Do

U+13D9

Uppercase letter (Lu)

UTF-8 encoding: E1 8F 99 (3 bytes).

Lookup U+13D9 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0013D9

RGB(0, 19, 217)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.19.217.

Address: 0.0.19.217
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.19.217

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

Musical pitch

Heard as a frequency, 5,081 Hz is closest to:

Concert pitch (A4 = 440 Hz): D♯8 (4978 Hz, +35¢)
Scientific pitch (C4 = 256 Hz): E8 (5160.6 Hz, -27¢)
Baroque pitch (A4 = 415 Hz): E8 (4974.4 Hz, +37¢)

Position in π

The digit sequence 5081 first appears in π at position 3,205 of the decimal expansion (the 3,205ordinal-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 5081 on Pi Search ↗