Number

229

229 is a prime, odd, a calendar year.

Arithmetic Number Cousin Prime Deficient Number Odious Number Pernicious Number Prime Pythagorean Prime Recamán's Sequence Sexy Prime Squarefree Twin Prime Year

Historical context — 229 AD

Calendar year

Year 229 (CCXXIX) was a common year starting on Thursday of the Julian calendar.

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Historical context — 229 BC

Calendar year

Year 229 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback 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: 53
Long year: contains 53 ISO weeks.
Started on: Thursday
January 1, 229
Ended on: Thursday
December 31, 229
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 220s
220–229
Century: 3rd century
201–300
Millennium: 1st millennium
1–1000
Years ago: 1,797
1797 years before 2026.

In other calendars

Hebrew: 3989 / 3990 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Earth zodiac:Rooster
Sexagenary cycle position 46 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 772 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 221 / 222 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 151 / 150 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 13
Digit product: 36
Digital root: 4
Palindrome: No
Bit width: 8 bits
Reversed: 922
Recamán's sequence: a(285) = 229
Square (n²): 52,441
Cube (n³): 12,008,989
Divisor count: 2
σ(n) — sum of divisors: 230
φ(n) — Euler's totient: 228

Primality

229 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 229

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 229)

1 × 229

First multiples

229 · 458 (double) · 687 · 916 · 1,145 · 1,374 · 1,603 · 1,832 · 2,061 · 2,290

Sums & aliquot sequence

As a sum of two squares: 2² + 15²

As consecutive integers: 114 + 115

Representations

In words: two hundred twenty-nine
Ordinal: 229th
Roman numeral: CCXXIX
Binary: 11100101
Octal: 345
Hexadecimal: 0xE5
Base64: 5Q==
One's complement: 26 (8-bit)

In other bases

ternary (3) 22111

quaternary (4) 3211

quinary (5) 1404

senary (6) 1021

septenary (7) 445

nonary (9) 274

undecimal (11) 199

duodecimal (12) 171

tridecimal (13) 148

tetradecimal (14) 125

pentadecimal (15) 104

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): σκθʹ
Mayan (base 20): 𝋫·𝋩
Chinese: 二百二十九
Chinese (financial): 貳佰貳拾玖

In other modern scripts

Eastern Arabic ٢٢٩ Devanagari २२९ Bengali ২২৯ Tamil ௨௨௯ Thai ๒๒๙ Tibetan ༢༢༩ Khmer ២២៩ Lao ໒໒໙ Burmese ၂၂၉

Digit at this position in famous constants

π — Pi (π): Digit 229 = 8
e — Euler's number (e): Digit 229 = 4
φ — Golden ratio (φ): Digit 229 = 2
√2 — Pythagoras's (√2): Digit 229 = 2
ln 2 — Natural log of 2: Digit 229 = 1
γ — Euler-Mascheroni (γ): Digit 229 = 1

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 227 (gap of 2)
Next prime: 233 (gap of 4)

Pair status: twin with 227, cousin with 233.

Unicode codepoint

Latin Small Letter A With Ring Above

U+00E5

Lowercase letter (Ll)

UTF-8 encoding: C3 A5 (2 bytes).

Lookup U+00E5 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0000E5

RGB(0, 0, 229)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.229.

Address: 0.0.0.229
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.229

Unspecified address (0.0.0.0/8) — "this network" placeholder.

NANP area code 229

The number 229 is an active NANP area code (North American Numbering Plan).

Primary area: Albany / Valdosta
Region: Georgia
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.

Look up area code 229 ↗