Number

505

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

Arithmetic Number Deficient Number Odious Number Palindrome Pernicious Number Recamán's Sequence Semiprime Squarefree Year

Historical context — 505 AD

Calendar year

Year 505 (DV) was a common year starting on Saturday of the Julian calendar.

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

Historical context — 505 BC

Calendar year

The year 505 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: 53
Long year: contains 53 ISO weeks.
Started on: Thursday
January 1, 505
Ended on: Thursday
December 31, 505
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 500s
500–509
Century: 6th century
501–600
Millennium: 1st millennium
1–1000
Years ago: 1,521
1521 years before 2026.

In other calendars

Hebrew: 4265 / 4266 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Wood zodiac:Rooster
Sexagenary cycle position 22 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1048 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 497 / 498 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 427 / 426 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 10
Digit product: 0
Digital root: 1
Palindrome: Yes
Bit width: 9 bits
Recamán's sequence: a(266) = 505
Square (n²): 255,025
Cube (n³): 128,787,625
Divisor count: 4
σ(n) — sum of divisors: 612
φ(n) — Euler's totient: 400
Sum of prime factors: 106

Primality

Prime factorization: 5 × 101

Nearest primes: 503 (−2) · 509 (+4)

Divisors & multiples

All divisors (4)

1 · 5 · 101 · 505

Aliquot sum (sum of proper divisors): 107

Factor pairs (a × b = 505)

1 × 505

5 × 101

First multiples

505 · 1,010 (double) · 1,515 · 2,020 · 2,525 · 3,030 · 3,535 · 4,040 · 4,545 · 5,050

Sums & aliquot sequence

As a sum of two squares: 8² + 21² = 12² + 19²

As consecutive integers: 252 + 253 99 + 100 + 101 + 102 + 103 46 + 47 + … + 55

Aliquot sequence: 505 → 107 → 1 → 0 — terminates at zero

Representations

In words: five hundred five
Ordinal: 505th
Roman numeral: DV
Binary: 111111001
Octal: 771
Hexadecimal: 0x1F9
Base64: Afk=
One's complement: 65,030 (16-bit)

In other bases

ternary (3) 200201

quaternary (4) 13321

quinary (5) 4010

senary (6) 2201

septenary (7) 1321

nonary (9) 621

undecimal (11) 41a

duodecimal (12) 361

tridecimal (13) 2cb

tetradecimal (14) 281

pentadecimal (15) 23a

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): φεʹ
Mayan (base 20): 𝋡·𝋥·𝋥
Chinese: 五百零五
Chinese (financial): 伍佰零伍

In other modern scripts

Eastern Arabic ٥٠٥ Devanagari ५०५ Bengali ৫০৫ Tamil ௫௦௫ Thai ๕๐๕ Tibetan ༥༠༥ Khmer ៥០៥ Lao ໕໐໕ Burmese ၅၀၅

Digit at this position in famous constants

π — Pi (π): Digit 505 = 3
e — Euler's number (e): Digit 505 = 6
φ — Golden ratio (φ): Digit 505 = 7
√2 — Pythagoras's (√2): Digit 505 = 8
ln 2 — Natural log of 2: Digit 505 = 8
γ — Euler-Mascheroni (γ): Digit 505 = 8

Also seen as

Unicode codepoint

Latin Small Letter N With Grave

U+01F9

Lowercase letter (Ll)

UTF-8 encoding: C7 B9 (2 bytes).

Lookup U+01F9 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0001F9

RGB(0, 1, 249)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.249.

Address: 0.0.1.249
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.249

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

NANP area code 505

The number 505 is an active NANP area code (North American Numbering Plan).

Primary area: Albuquerque / Santa Fe
Region: New Mexico
Country: United States

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 505 ↗

Possible US bank routing number

This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.

Routing number

000000505

Federal Reserve

United States Government

Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.

Look up on FedACH (official) ↗ Search Google for routing number 000000505 ↗