195

195 = 3 x 5 x 13.

195 is 11000011 in base 2 (binary), 3003 in base 4, and 303 in base 8.

195 is the third integer that is the sum of the squares of three consecutive primes: 195 = 11² + 7² + 5².

195 is in the middle of the prime quadruplet 191, 193, 197, and 199.

IC 195 is one member of a pair of galaxies in the constellation Aries.

Source: Prime Curios!