Number

565

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

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

Historical context — 565 AD

Calendar year

Year 565 (DLXV) was a common year starting on Thursday of the Julian calendar.

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

Historical context — 565 BC

Decade

This article concerns the period 569 BC – 560 BC.

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: Tuesday
January 1, 565
Ended on: Tuesday
December 31, 565
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 560s
560–569
Century: 6th century
501–600
Millennium: 1st millennium
1–1000
Years ago: 1,461
1461 years before 2026.

In other calendars

Hebrew: 4325 / 4326 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: 1108 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 557 / 558 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 487 / 486 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 16
Digit product: 150
Digital root: 7
Palindrome: Yes
Bit width: 10 bits
Recamán's sequence: a(1,129) = 565
Square (n²): 319,225
Cube (n³): 180,362,125
Divisor count: 4
σ(n) — sum of divisors: 684
φ(n) — Euler's totient: 448
Sum of prime factors: 118

Primality

Prime factorization: 5 × 113

Nearest primes: 563 (−2) · 569 (+4)

Divisors & multiples

All divisors (4)

1 · 5 · 113 · 565

Aliquot sum (sum of proper divisors): 119

Factor pairs (a × b = 565)

1 × 565

5 × 113

First multiples

565 · 1,130 (double) · 1,695 · 2,260 · 2,825 · 3,390 · 3,955 · 4,520 · 5,085 · 5,650

Sums & aliquot sequence

As a sum of two squares: 6² + 23² = 9² + 22²

As consecutive integers: 282 + 283 111 + 112 + 113 + 114 + 115 52 + 53 + … + 61

Aliquot sequence: 565 → 119 → 25 → 6 → 6 — reaches a perfect number

Representations

In words: five hundred sixty-five
Ordinal: 565th
Roman numeral: DLXV
Binary: 1000110101
Octal: 1065
Hexadecimal: 0x235
Base64: AjU=
One's complement: 64,970 (16-bit)

In other bases

ternary (3) 202221

quaternary (4) 20311

quinary (5) 4230

senary (6) 2341

septenary (7) 1435

nonary (9) 687

undecimal (11) 474

duodecimal (12) 3b1

tridecimal (13) 346

tetradecimal (14) 2c5

pentadecimal (15) 27a

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): φξεʹ
Mayan (base 20): 𝋡·𝋨·𝋥
Chinese: 五百六十五
Chinese (financial): 伍佰陸拾伍

In other modern scripts

Eastern Arabic ٥٦٥ Devanagari ५६५ Bengali ৫৬৫ Tamil ௫௬௫ Thai ๕๖๕ Tibetan ༥༦༥ Khmer ៥៦៥ Lao ໕໖໕ Burmese ၅၆၅

Digit at this position in famous constants

π — Pi (π): Digit 565 = 9
e — Euler's number (e): Digit 565 = 5
φ — Golden ratio (φ): Digit 565 = 0
√2 — Pythagoras's (√2): Digit 565 = 5
ln 2 — Natural log of 2: Digit 565 = 2
γ — Euler-Mascheroni (γ): Digit 565 = 7

Also seen as

Unicode codepoint

Latin Small Letter N With Curl

U+0235

Lowercase letter (Ll)

UTF-8 encoding: C8 B5 (2 bytes).

Lookup U+0235 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000235

RGB(0, 2, 53)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.53.

Address: 0.0.2.53
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.53

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