general_fact: 7552 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 7552 is the number of arrangements of 6 non-attacking queens on a 10×6 chessboard.
trivia: 7552 is an unremarkable number.
historical_date: September 3rd is the day in 1914 that William, Prince of Albania leaves the country after just six months due to opposition to his rule.