553
553 is a composite number, odd, a calendar year.
553 (five hundred fifty-three) is an odd 3-digit number. It is a composite number with 4 divisors, and factors as 7 × 79. Written other ways, in Roman numerals it is DLIII and in binary, 1000101001.
Interestingness
Historical context — 553 AD
Calendar year
Year 553 (DLIII) was a common year starting on Wednesday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →
Historical context — 553 BC
Calendar year
The year 553 BC was a year of the pre-Julian Roman calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →
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
-
Monday
January 1, 553
- Ended on
-
Monday
December 31, 553
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
550s
550–559
- Century
-
6th century
501–600
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,473
1473 years before 2026.
In other calendars
- Hebrew
-
4313 / 4314 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Water zodiac:Rooster
Sexagenary cycle position 10 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1096 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
545 / 546 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
475 / 474 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 7 × 79
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√553 = [23; (1, 1, 15, 5, 1, 4, 2, 1, 1, 3, 1, 2, 6, 2, 1, 3, 1, 1, 2, 4, 1, 5, 15, 1, …)]
Period length 26 — the block in parentheses repeats forever.
Representations
- In words
- five hundred fifty-three
- Ordinal
- 553rd
- Roman numeral
- DLIII
- Binary
- 1000101001
- Octal
- 1051
- Hexadecimal
- 0x229
- Base64
- Aik=
- One's complement
- 64,982 (16-bit)
- Scientific notation
- 5.53 × 10²
- As a duration
- 553 s = 9 minutes, 13 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- φνγʹ
- Mayan (base 20)
- 𝋡·𝋧·𝋭
- Chinese
- 五百五十三
- Chinese (financial)
- 伍佰伍拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 553 = 0
- e — Euler's number (e)
- Digit 553 = 8
- φ — Golden ratio (φ)
- Digit 553 = 8
- √2 — Pythagoras's (√2)
- Digit 553 = 7
- ln 2 — Natural log of 2
- Digit 553 = 3
- γ — Euler-Mascheroni (γ)
- Digit 553 = 8
Also seen as
UTF-8 encoding: C8 A9 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.41.
- Address
- 0.0.2.41
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.41
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 553 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C♯5 (554.4 Hz, -4¢)
- Scientific pitch (C4 = 256 Hz): C♯5 (542.4 Hz, +33¢)
- Baroque pitch (A4 = 415 Hz): D5 (554 Hz, -3¢)
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.