Fatto matematico: 2297 is the number of inequivalent binary linear codes of length 10.
Trivia: 2297 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: April 15th is the day in 1943 that an Allied bomber attack misses the Minerva automobile factory and hits the Belgian town of Mortsel instead, killing 936 civilians.