Fatto generale: 2555 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2555 is a boring number.
Trivia: 2555 is an uninteresting number.
Data storica: December 29th is the day in 1997 that Hong Kong begins to kill all the nation's 1.25 million chickens to stop the spread of a potentially deadly influenza strain.