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Number

481

481 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Harshad / Niven Octagonal Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree Year

Historical context — 481 AD

Calendar year

Year 481 (CDLXXXI) was a common year starting on Thursday of the Julian calendar.

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Historical context — 481 BC

Calendar year

Year 481 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Wednesday
January 1, 481
Ended on: Wednesday
December 31, 481
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 480s
480–489
Century: 5th century
401–500
Millennium: 1st millennium
1–1000
Years ago: 1,545
1545 years before 2026.

In other calendars

Hebrew: 4241 / 4242 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Rooster
Sexagenary cycle position 58 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1024 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 473 / 474 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 403 / 402 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 13
Digit product: 32
Digital root: 4
Palindrome: No
Bit width: 9 bits
Reversed: 184
Recamán's sequence: a(358) = 481
Square (n²): 231,361
Cube (n³): 111,284,641
Divisor count: 4
σ(n) — sum of divisors: 532
φ(n) — Euler's totient: 432
Sum of prime factors: 50

Primality

Prime factorization: 13 × 37

Nearest primes: 479 (−2) · 487 (+6)

Divisors & multiples

All divisors (4)

1 · 13 · 37 · 481

Aliquot sum (sum of proper divisors): 51

Factor pairs (a × b = 481)

1 × 481

13 × 37

First multiples

481 · 962 (double) · 1,443 · 1,924 · 2,405 · 2,886 · 3,367 · 3,848 · 4,329 · 4,810

Sums & aliquot sequence

As a sum of two squares: 9² + 20² = 15² + 16²

As consecutive integers: 240 + 241 31 + 32 + … + 43 6 + 7 + … + 31

Aliquot sequence: 481 → 51 → 21 → 11 → 1 → 0 — terminates at zero

Representations

In words: four hundred eighty-one
Ordinal: 481st
Roman numeral: CDLXXXI
Binary: 111100001
Octal: 741
Hexadecimal: 0x1E1
Base64: AeE=
One's complement: 65,054 (16-bit)

In other bases

ternary (3) 122211

quaternary (4) 13201

quinary (5) 3411

senary (6) 2121

septenary (7) 1255

nonary (9) 584

undecimal (11) 3a8

duodecimal (12) 341

tridecimal (13) 2b0

tetradecimal (14) 265

pentadecimal (15) 221

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): υπαʹ
Mayan (base 20): 𝋡·𝋤·𝋡
Chinese: 四百八十一
Chinese (financial): 肆佰捌拾壹

In other modern scripts

Eastern Arabic ٤٨١ Devanagari ४८१ Bengali ৪৮১ Tamil ௪௮௧ Thai ๔๘๑ Tibetan ༤༨༡ Khmer ៤៨១ Lao ໔໘໑ Burmese ၄၈၁

Digit at this position in famous constants

π — Pi (π): Digit 481 = 4
e — Euler's number (e): Digit 481 = 7
φ — Golden ratio (φ): Digit 481 = 3
√2 — Pythagoras's (√2): Digit 481 = 3
ln 2 — Natural log of 2: Digit 481 = 2
γ — Euler-Mascheroni (γ): Digit 481 = 5

Also seen as

Unicode codepoint

ǡ

Latin Small Letter A With Dot Above And Macron

U+01E1

Lowercase letter (Ll)

UTF-8 encoding: C7 A1 (2 bytes).

Lookup U+01E1 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0001E1

RGB(0, 1, 225)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.225.

Address: 0.0.1.225
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.225

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