195 (number)

From Wikipedia, the free encyclopedia
← 194 195 196 →
190 191 192 193 194 195 196 197 198 199
List of numbersIntegers
0 100 200 300 400 500 600 700 800 900
Cardinalone hundred ninety-five
Ordinal195th
(one hundred ninety-fifth)
Factorization3 × 5 × 13
Greek numeralΡϞΕ´
Roman numeralCXCV
Binary110000112
Ternary210203
Octal3038
Duodecimal14312
HexadecimalC316

195 (one hundred [and] ninety-five) is the natural number following 194 and preceding 196.

In mathematics[]

  • 195 is an odd number
  • 195 is a composite number
  • 195 is a deficient number, as 141 is less than 195
  • 195 is a Harshad number
  • 195 is a lucky number
  • 195 is a sphenic number, in the middle of the prime quadruplet 191, 193, 197 and 199
  • 195 is a square-free number
  • 195 is the sum of eleven consecutive primes: 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37
  • Although not itself prime, 195 passes through Ulam's sieve and thus is a lucky number
  • 195 is the smallest number expressed as a sum of distinct squares in 16 different ways (sequence A097563 in the OEIS)
  • 195 is both a 21-gonal[1] and 66-gonal number

In astronomy[]

  • is a galaxy. It is part of the Arp 290 pair of galaxies, along with IC 196
  • 195 Eurykleia is a large main belt asteroid

In geography[]

  • 195 Broadway is a 29-story building in the Financial District of New York City

In the military[]

In transportation[]

  • Cessna 195 was a light radial engine powered general aviation aircraft between 1947 and 1954
  • Ferrari 195 Inter was a GT car produced by Ferrari in 1950
  • Ferrari 195 S was a racing sports car produced by Ferrari in 1950
  • London Buses route 195
  • The Embraer 195 jet


In other fields[]

195 is also:

  • The year AD 195 or 195 BC
  • The atomic number of an element temporarily called Unennpentium
  • the number of members of the United Nations (if you include the observer states)
  • Minuscule 195 is a Greek minuscule manuscript of the New Testament, on parchment

See also[]

External links[]

References[]

  1. ^ Sloane, N. J. A. (ed.). "Sequence A051873 (21-gonal numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
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