Hecho general: 55540 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 55540 is a boring number.
Trivia: 55540 is a boring number.
Fecha histórica: January 23rd is the day in 1957 that American inventor Walter Frederick Morrison sells the rights to his flying disc to the Wham-O toy company, who later rename it the "Frisbee".