271
271 is a prime, odd, a calendar year.
271 (two hundred seventy-one) is an odd 3-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in Roman numerals it is CCLXXI and in binary, 100001111.
Interestingness
Historical context — 271 AD
Calendar year
Year 271 (CCLXXI) was a common year starting on Sunday of the Julian calendar.
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Historical context — 271 BC
Calendar year
Year 271 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
-
Sunday
January 1, 271
- Ended on
-
Sunday
December 31, 271
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
270s
270–279
- Century
-
3rd century
201–300
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,755
1755 years before 2026.
In other calendars
- Hebrew
-
4031 / 4032 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
-
814 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
263 / 264 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
193 / 192 Saka
Indian national calendar; year starts in March.
Properties
Primality
271 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√271 = [16; (2, 6, 10, 1, 4, 1, 1, 2, 1, 2, 1, 15, 1, 2, 1, 2, 1, 1, 4, 1, 10, 6, 2, 32)]
Period length 24 — the block in parentheses repeats forever.
Representations
- In words
- two hundred seventy-one
- Ordinal
- 271st
- Roman numeral
- CCLXXI
- Binary
- 100001111
- Octal
- 417
- Hexadecimal
- 0x10F
- Base64
- AQ8=
- One's complement
- 65,264 (16-bit)
- Scientific notation
- 2.71 × 10²
- As a duration
- 271 s = 4 minutes, 31 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- σοαʹ
- Mayan (base 20)
- 𝋭·𝋫
- Chinese
- 二百七十一
- Chinese (financial)
- 貳佰柒拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 271 = 0
- e — Euler's number (e)
- Digit 271 = 3
- φ — Golden ratio (φ)
- Digit 271 = 0
- √2 — Pythagoras's (√2)
- Digit 271 = 4
- ln 2 — Natural log of 2
- Digit 271 = 6
- γ — Euler-Mascheroni (γ)
- Digit 271 = 9
Also seen as
UTF-8 encoding: C4 8F (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.15.
- Address
- 0.0.1.15
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.1.15
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 271 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C♯4 (277.2 Hz, -39¢)
- Scientific pitch (C4 = 256 Hz): C♯4 (271.2 Hz, -1¢)
- Baroque pitch (A4 = 415 Hz): D4 (277 Hz, -38¢)
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.