Hecho general: 52381 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 52381 is an unremarkable number.
Trivia: 52381 is an unremarkable number.
Fecha histórica: May 31st is the day in 1578 that Martin Frobisher sails from Harwich, England to Frobisher Bay, Canada, eventually to mine fool's gold, used to pave streets in London.