Number

195

195 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Evil Number Gapful Number Harshad / Niven Recamán's Sequence Sphenic Number Squarefree Year

Historical context — 195 AD

Calendar year

Year 195 (CXCV) was a common year starting on Wednesday of the Julian calendar.

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Historical context — 195 BC

Calendar year

Year 195 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, 195
Ended on: Thursday
December 31, 195
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 190s
190–199
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,831
1831 years before 2026.

In other calendars

Hebrew: 3955 / 3956 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Wood zodiac:Pig
Sexagenary cycle position 12 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 738 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 187 / 188 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 117 / 116 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 15
Digit product: 45
Digital root: 6
Palindrome: No
Bit width: 8 bits
Reversed: 591
Recamán's sequence: a(1,381) = 195
Square (n²): 38,025
Cube (n³): 7,414,875
Divisor count: 8
σ(n) — sum of divisors: 336
φ(n) — Euler's totient: 96
Sum of prime factors: 21

Primality

Prime factorization: 3 × 5 × 13

Nearest primes: 193 (−2) · 197 (+2)

Divisors & multiples

All divisors (8)

1 · 3 · 5 · 13 · 15 · 39 · 65 · 195

Aliquot sum (sum of proper divisors): 141

Factor pairs (a × b = 195)

1 × 195

3 × 65

5 × 39

13 × 15

First multiples

195 · 390 (double) · 585 · 780 · 975 · 1,170 · 1,365 · 1,560 · 1,755 · 1,950

Sums & aliquot sequence

As consecutive integers: 97 + 98 64 + 65 + 66 37 + 38 + 39 + 40 + 41 30 + 31 + 32 + 33 + 34 + 35

Aliquot sequence: 195 → 141 → 51 → 21 → 11 → 1 → 0 — terminates at zero

Representations

In words: one hundred ninety-five
Ordinal: 195th
Roman numeral: CXCV
Binary: 11000011
Octal: 303
Hexadecimal: 0xC3
Base64: ww==
One's complement: 60 (8-bit)

In other bases

ternary (3) 21020

quaternary (4) 3003

quinary (5) 1240

senary (6) 523

septenary (7) 366

nonary (9) 236

undecimal (11) 168

duodecimal (12) 143

tridecimal (13) 120

tetradecimal (14) dd

pentadecimal (15) d0

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ρϟεʹ
Mayan (base 20): 𝋩·𝋯
Chinese: 一百九十五
Chinese (financial): 壹佰玖拾伍

In other modern scripts

Eastern Arabic ١٩٥ Devanagari १९५ Bengali ১৯৫ Tamil ௧௯௫ Thai ๑๙๕ Tibetan ༡༩༥ Khmer ១៩៥ Lao ໑໙໕ Burmese ၁၉၅

Digit at this position in famous constants

π — Pi (π): Digit 195 = 3
e — Euler's number (e): Digit 195 = 5
φ — Golden ratio (φ): Digit 195 = 9
√2 — Pythagoras's (√2): Digit 195 = 6
ln 2 — Natural log of 2: Digit 195 = 7
γ — Euler-Mascheroni (γ): Digit 195 = 4

Also seen as

Unicode codepoint

Latin Capital Letter A With Tilde

U+00C3

Uppercase letter (Lu)

UTF-8 encoding: C3 83 (2 bytes).

Lookup U+00C3 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0000C3

RGB(0, 0, 195)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.195.

Address: 0.0.0.195
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.195

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