Hecho general: 55030 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 55030 is a boring number.
Trivia: 55030 is an unremarkable number.
Fecha histórica: August 31st is the day in 1803 that Lewis and Clark start their expedition to the west by leaving Pittsburgh, Pennsylvania at 11 in the morning.