Fatto generale: 53329 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 53329 is an unremarkable number.
Trivia: 53329 is an uninteresting number.
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.