571
571 is a prime, odd, a calendar year.
Historical context — 571 AD
Calendar year
Year 571 (DLXXI) was a common year starting on Thursday of the Julian calendar.
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Historical context — 571 BC
Calendar year
The year 571 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
-
Tuesday
January 1, 571
- Ended on
-
Tuesday
December 31, 571
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
570s
570–579
- Century
-
6th century
501–600
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,455
1455 years before 2026.
In other calendars
- Hebrew
-
4331 / 4332 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
-
1114 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
563 / 564 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
493 / 492 Saka
Indian national calendar; year starts in March.
Properties
Primality
571 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- five hundred seventy-one
- Ordinal
- 571st
- Roman numeral
- DLXXI
- Binary
- 1000111011
- Octal
- 1073
- Hexadecimal
- 0x23B
- Base64
- Ajs=
- One's complement
- 64,964 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- φοαʹ
- Mayan (base 20)
- 𝋡·𝋨·𝋫
- Chinese
- 五百七十一
- Chinese (financial)
- 伍佰柒拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 571 = 6
- e — Euler's number (e)
- Digit 571 = 0
- φ — Golden ratio (φ)
- Digit 571 = 0
- √2 — Pythagoras's (√2)
- Digit 571 = 6
- ln 2 — Natural log of 2
- Digit 571 = 4
- γ — Euler-Mascheroni (γ)
- Digit 571 = 6
Also seen as
UTF-8 encoding: C8 BB (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.59.
- Address
- 0.0.2.59
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.59
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 571 is an active NANP area code (North American Numbering Plan).
- Primary area
- Northern Virginia
- Region
- Virginia
- 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.