1,431
1,431 is a composite number, odd, a calendar year.
Notable events — 1431 AD
- May 30 Joan of Arc is burned at the stake at Rouen.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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
-
Saturday
January 1, 1431
- Ended on
-
Saturday
December 31, 1431
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1430s
1430–1439
- Century
-
15th century
1401–1500
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
595
595 years before 2026.
In other calendars
- Hebrew
-
5191 / 5192 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
834 / 835 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Pig
Sexagenary cycle position 48 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1974 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
809 / 810 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1423 / 1424 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1353 / 1352 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 3 3 × 53
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand four hundred thirty-one
- Ordinal
- 1431st
- Roman numeral
- MCDXXXI
- Binary
- 10110010111
- Octal
- 2627
- Hexadecimal
- 0x597
- Base64
- BZc=
- One's complement
- 64,104 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵αυλαʹ
- Mayan (base 20)
- 𝋣·𝋫·𝋫
- Chinese
- 一千四百三十一
- Chinese (financial)
- 壹仟肆佰參拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,431 = 2
- e — Euler's number (e)
- Digit 1,431 = 9
- φ — Golden ratio (φ)
- Digit 1,431 = 1
- √2 — Pythagoras's (√2)
- Digit 1,431 = 9
- ln 2 — Natural log of 2
- Digit 1,431 = 2
- γ — Euler-Mascheroni (γ)
- Digit 1,431 = 7
Also seen as
UTF-8 encoding: D6 97 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.151.
- Address
- 0.0.5.151
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.151
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1431 first appears in π at position 2,118 of the decimal expansion (the 2,118ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.