1,822
1,822 is a composite number, even, a calendar year.
Notable events — 1822 AD
- Sep 7 Brazil declares independence from Portugal under Pedro I.
- Aug 12 Liberian colony of Mesurado is founded as Monrovia.
- Sep 27 Jean-François Champollion announces his decipherment of Egyptian hieroglyphs.
- Feb 7 Tongan king Kau Ulufonua is converted to Christianity.
- Apr 4 Pope Pius VII restores the Jesuits to several countries.
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
-
Tuesday
January 1, 1822
- Ended on
-
Tuesday
December 31, 1822
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 7
Sunday, April 7, 1822
- Decade
-
1820s
1820–1829
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
204
204 years before 2026.
In other calendars
- Hebrew
-
5582 / 5583 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1237 / 1238 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Horse
Sexagenary cycle position 19 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2365 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1200 / 1201 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1814 / 1815 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1744 / 1743 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 911
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand eight hundred twenty-two
- Ordinal
- 1822nd
- Roman numeral
- MDCCCXXII
- Binary
- 11100011110
- Octal
- 3436
- Hexadecimal
- 0x71E
- Base64
- Bx4=
- One's complement
- 63,713 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵αωκβʹ
- Mayan (base 20)
- 𝋤·𝋫·𝋢
- Chinese
- 一千八百二十二
- Chinese (financial)
- 壹仟捌佰貳拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,822 = 3
- e — Euler's number (e)
- Digit 1,822 = 3
- φ — Golden ratio (φ)
- Digit 1,822 = 5
- √2 — Pythagoras's (√2)
- Digit 1,822 = 3
- ln 2 — Natural log of 2
- Digit 1,822 = 6
- γ — Euler-Mascheroni (γ)
- Digit 1,822 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1822, here are decompositions:
- 11 + 1811 = 1822
- 89 + 1733 = 1822
- 101 + 1721 = 1822
- 113 + 1709 = 1822
- 239 + 1583 = 1822
- 251 + 1571 = 1822
- 263 + 1559 = 1822
- 269 + 1553 = 1822
Showing the first eight; more decompositions exist.
UTF-8 encoding: DC 9E (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.30.
- Address
- 0.0.7.30
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.30
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1822 first appears in π at position 46,046 of the decimal expansion (the 46,046ordinal-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.