Number

555

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

Arithmetic Number Deficient Number Harshad / Niven Odious Number Palindrome Pernicious Number Recamán's Sequence Repdigit Sphenic Number Squarefree Year

Historical context — 555 AD

Calendar year

Year 555 (DLV) was a common year starting on Friday of the Julian calendar.

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Historical context — 555 BC

Calendar year

The year 555 BC was a year of the pre-Julian Roman calendar.

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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, 555
Ended on: Wednesday
December 31, 555
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 550s
550–559
Century: 6th century
501–600
Millennium: 1st millennium
1–1000
Years ago: 1,471
1471 years before 2026.

In other calendars

Hebrew: 4315 / 4316 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Wood zodiac:Pig
Sexagenary cycle position 12 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1098 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 547 / 548 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 477 / 476 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 15
Digit product: 125
Digital root: 6
Palindrome: Yes
Bit width: 10 bits
Recamán's sequence: a(1,149) = 555
Square (n²): 308,025
Cube (n³): 170,953,875
Divisor count: 8
σ(n) — sum of divisors: 912
φ(n) — Euler's totient: 288
Sum of prime factors: 45

Primality

Prime factorization: 3 × 5 × 37

Nearest primes: 547 (−8) · 557 (+2)

Divisors & multiples

All divisors (8)

1 · 3 · 5 · 15 · 37 · 111 · 185 · 555

Aliquot sum (sum of proper divisors): 357

Factor pairs (a × b = 555)

1 × 555

3 × 185

5 × 111

15 × 37

First multiples

555 · 1,110 (double) · 1,665 · 2,220 · 2,775 · 3,330 · 3,885 · 4,440 · 4,995 · 5,550

Sums & aliquot sequence

As consecutive integers: 277 + 278 184 + 185 + 186 109 + 110 + 111 + 112 + 113 90 + 91 + 92 + 93 + 94 + 95

Aliquot sequence: 555 → 357 → 219 → 77 → 19 → 1 → 0 — terminates at zero

Representations

In words: five hundred fifty-five
Ordinal: 555th
Roman numeral: DLV
Binary: 1000101011
Octal: 1053
Hexadecimal: 0x22B
Base64: Ais=
One's complement: 64,980 (16-bit)

In other bases

ternary (3) 202120

quaternary (4) 20223

quinary (5) 4210

senary (6) 2323

septenary (7) 1422

nonary (9) 676

undecimal (11) 465

duodecimal (12) 3a3

tridecimal (13) 339

tetradecimal (14) 2b9

pentadecimal (15) 270

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): φνεʹ
Mayan (base 20): 𝋡·𝋧·𝋯
Chinese: 五百五十五
Chinese (financial): 伍佰伍拾伍

In other modern scripts

Eastern Arabic ٥٥٥ Devanagari ५५५ Bengali ৫৫৫ Tamil ௫௫௫ Thai ๕๕๕ Tibetan ༥༥༥ Khmer ៥៥៥ Lao ໕໕໕ Burmese ၅၅၅

Digit at this position in famous constants

π — Pi (π): Digit 555 = 4
e — Euler's number (e): Digit 555 = 6
φ — Golden ratio (φ): Digit 555 = 5
√2 — Pythagoras's (√2): Digit 555 = 4
ln 2 — Natural log of 2: Digit 555 = 6
γ — Euler-Mascheroni (γ): Digit 555 = 1

Also seen as

Unicode codepoint

Latin Small Letter O With Diaeresis And Macron

U+022B

Lowercase letter (Ll)

UTF-8 encoding: C8 AB (2 bytes).

Lookup U+022B on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00022B

RGB(0, 2, 43)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.43.

Address: 0.0.2.43
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.43

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