Hecho general: 52580 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 52580 is an unremarkable number.
Trivia: 52580 is an uninteresting number.
Fecha histórica: December 16th is the day in 1920 that the Haiyuan earthquake, magnitude 8.5, rocks the Gansu province in China, killing an estimated 200,000.