Hecho general: 15350 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 15350 is an unremarkable number.
Trivia: 15350 is a boring number.
Fecha histórica: January 9th is the day in 1894 that New England Telephone and Telegraph installs the first battery-operated telephone switchboard in Lexington, Massachusetts.