Hecho general: 75319 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 75319 is an unremarkable number.
Trivia: 75319 is an uninteresting number.
Fecha histórica: March 20th is the day in 1964 that the precursor of the European Space Agency, ESRO (European Space Research Organization) is established per an agreement signed on June 14, 1962.