Fatto generale: 16513 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 16513 is an unremarkable number.
Trivia: 16513 is a boring number.
Data storica: March 17th is the day in 1973 that the Pulitzer Prize-winning photograph Burst of Joy is taken, depicting a former prisoner of war being reunited with his family.