Hecho general: 53612 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 53612 is a boring number.
Trivia: 53612 is an uninteresting number.
Fecha histórica: October 13th is the day in 1983 that Ameritech Mobile Communications (now AT&T) launched the first US cellular network in Chicago, Illinois.