Hecho matemático: 15547 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 15547 is an unremarkable number.
Fecha histórica: July 25th is the day in 1693 that Ignacio de Maya founds the Real Santiago de las Sabinas, now known as Sabinas Hidalgo, Nuevo León, México.