Fatto generale: 2195 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2195 is the number of necklaces with 9 beads, each one of 3 colors.
Trivia: 2195 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: January 3rd is the day in 1888 that the refracting telescope at the Lick Observatory, measuring 91 cm in diameter, is used for the first time.