Number

511

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

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

Historical context — 511 AD

Calendar year

Year 511 (DXI) was a common year starting on Saturday of the Julian 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: 53
Long year: contains 53 ISO weeks.
Started on: Thursday
January 1, 511
Ended on: Thursday
December 31, 511
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 510s
510–519
Century: 6th century
501–600
Millennium: 1st millennium
1–1000
Years ago: 1,515
1515 years before 2026.

In other calendars

Hebrew: 4271 / 4272 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Rabbit
Sexagenary cycle position 28 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1054 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 503 / 504 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 433 / 432 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 7
Digit product: 5
Digital root: 7
Palindrome: No
Bit width: 9 bits
Reversed: 115
Recamán's sequence: a(278) = 511
Square (n²): 261,121
Cube (n³): 133,432,831
Divisor count: 4
σ(n) — sum of divisors: 592
φ(n) — Euler's totient: 432
Sum of prime factors: 80

Primality

Prime factorization: 7 × 73

Nearest primes: 509 (−2) · 521 (+10)

Divisors & multiples

All divisors (4)

1 · 7 · 73 · 511

Aliquot sum (sum of proper divisors): 81

Factor pairs (a × b = 511)

1 × 511

7 × 73

First multiples

511 · 1,022 (double) · 1,533 · 2,044 · 2,555 · 3,066 · 3,577 · 4,088 · 4,599 · 5,110

Sums & aliquot sequence

As consecutive integers: 255 + 256 70 + 71 + … + 76 30 + 31 + … + 43

Aliquot sequence: 511 → 81 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Representations

In words: five hundred eleven
Ordinal: 511th
Roman numeral: DXI
Binary: 111111111
Octal: 777
Hexadecimal: 0x1FF
Base64: Af8=
One's complement: 65,024 (16-bit)

In other bases

ternary (3) 200221

quaternary (4) 13333

quinary (5) 4021

senary (6) 2211

septenary (7) 1330

nonary (9) 627

undecimal (11) 425

duodecimal (12) 367

tridecimal (13) 304

tetradecimal (14) 287

pentadecimal (15) 241

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓎆𓏺
Greek (Milesian): φιαʹ
Mayan (base 20): 𝋡·𝋥·𝋫
Chinese: 五百一十一
Chinese (financial): 伍佰壹拾壹

In other modern scripts

Eastern Arabic ٥١١ Devanagari ५११ Bengali ৫১১ Tamil ௫௧௧ Thai ๕๑๑ Tibetan ༥༡༡ Khmer ៥១១ Lao ໕໑໑ Burmese ၅၁၁

Digit at this position in famous constants

π — Pi (π): Digit 511 = 2
e — Euler's number (e): Digit 511 = 5
φ — Golden ratio (φ): Digit 511 = 8
√2 — Pythagoras's (√2): Digit 511 = 4
ln 2 — Natural log of 2: Digit 511 = 4
γ — Euler-Mascheroni (γ): Digit 511 = 4

Also seen as

Unicode codepoint

Latin Small Letter O With Stroke And Acute

U+01FF

Lowercase letter (Ll)

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

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

Hex color

#0001FF

RGB(0, 1, 255)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.255.

Address: 0.0.1.255
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.255

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