Fatto generale: 5501 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5501 is a boring number.
Trivia: 5501 is an uninteresting number.
Data storica: January 22nd is the day in 1957 that the New York City "Mad Bomber", George P. Metesky, is arrested in Waterbury, Connecticut and is charged with planting more than 30 bombs.