Fatto generale: 5547 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5547 is an uninteresting number.
Trivia: 5547 is an unremarkable number.
Data storica: March 9th is the day in 1910 that the Westmoreland County Coal Strike, involving 15,000 coal miners represented by the United Mine Workers, begins.