1,557
1,557 is a composite number, odd, a calendar year.
Notable events — 1557 AD
- Aug 10 The Spanish defeat the French at Saint-Quentin.
- Feb 22 Portugal sets up a permanent settlement at Macau.
- Undated Robert Recorde introduces the equals sign "=".
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, 1557
- Ended on
-
Tuesday
December 31, 1557
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1550s
1550–1559
- Century
-
16th century
1501–1600
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
469
469 years before 2026.
In other calendars
- Hebrew
-
5317 / 5318 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
964 / 965 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Fire zodiac:Snake
Sexagenary cycle position 54 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2100 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
935 / 936 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1549 / 1550 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1479 / 1478 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 18
- Digit product
- 175
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 7,551
- Recamán's sequence
- a(1,446) = 1,557
- Square (n²)
- 2,424,249
- Cube (n³)
- 3,774,555,693
- Divisor count
- 6
- σ(n) — sum of divisors
- 2,262
- φ(n) — Euler's totient
- 1,032
- Sum of prime factors
- 179
Primality
Prime factorization: 3 2 × 173
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand five hundred fifty-seven
- Ordinal
- 1557th
- Roman numeral
- MDLVII
- Binary
- 11000010101
- Octal
- 3025
- Hexadecimal
- 0x615
- Base64
- BhU=
- One's complement
- 63,978 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αφνζʹ
- Mayan (base 20)
- 𝋣·𝋱·𝋱
- Chinese
- 一千五百五十七
- Chinese (financial)
- 壹仟伍佰伍拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,557 = 0
- e — Euler's number (e)
- Digit 1,557 = 2
- φ — Golden ratio (φ)
- Digit 1,557 = 9
- √2 — Pythagoras's (√2)
- Digit 1,557 = 4
- ln 2 — Natural log of 2
- Digit 1,557 = 6
- γ — Euler-Mascheroni (γ)
- Digit 1,557 = 8
Also seen as
UTF-8 encoding: D8 95 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.21.
- Address
- 0.0.6.21
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.21
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1557 first appears in π at position 1,100 of the decimal expansion (the 1,100ordinal-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.