219
219 is a composite number, odd, a calendar year.
219 (two hundred nineteen) is an odd 3-digit number. It is a composite number with 4 divisors, and factors as 3 × 73. Written other ways, in Roman numerals it is CCXIX and in binary, 11011011.
Interestingness
Historical context — 219 AD
Calendar year
Year 219 (CCXIX) was a common year starting on Friday of the Julian calendar.
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Historical context — 219 BC
Calendar year
Year 219 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
-
Friday
January 1, 219
- Ended on
-
Friday
December 31, 219
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
210s
210–219
- Century
-
3rd century
201–300
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,807
1807 years before 2026.
In other calendars
- Hebrew
-
3979 / 3980 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Earth zodiac:Pig
Sexagenary cycle position 36 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
762 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
211 / 212 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
141 / 140 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 3 × 73
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√219 = [14; (1, 3, 1, 28)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- two hundred nineteen
- Ordinal
- 219th
- Roman numeral
- CCXIX
- Binary
- 11011011
- Octal
- 333
- Hexadecimal
- 0xDB
- Base64
- 2w==
- One's complement
- 36 (8-bit)
- Scientific notation
- 2.19 × 10²
- As a duration
- 219 s = 3 minutes, 39 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- σιθʹ
- Mayan (base 20)
- 𝋪·𝋳
- Chinese
- 二百一十九
- Chinese (financial)
- 貳佰壹拾玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 219 = 4
- e — Euler's number (e)
- Digit 219 = 5
- φ — Golden ratio (φ)
- Digit 219 = 1
- √2 — Pythagoras's (√2)
- Digit 219 = 7
- ln 2 — Natural log of 2
- Digit 219 = 2
- γ — Euler-Mascheroni (γ)
- Digit 219 = 7
Also seen as
UTF-8 encoding: C3 9B (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.219.
- Address
- 0.0.0.219
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.0.219
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 219 is an active NANP area code (North American Numbering Plan).
- Primary area
- Gary / Hammond
- Region
- Indiana
- 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.
Heard as a frequency, 219 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A3 (220 Hz, -8¢)
- Scientific pitch (C4 = 256 Hz): A3 (215.3 Hz, +30¢)
- Baroque pitch (A4 = 415 Hz): A♯3 (219.8 Hz, -7¢)
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.