Fatto generale: 2157 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2157 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 2157 is an uninteresting number.
Data storica: November 26th is the day in 1998 that Tony Blair becomes the first Prime Minister of the United Kingdom to address the Republic of Ireland's parliament.