Fatto generale: 2152 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2152 is an uninteresting number.
Trivia: 2152 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 21st is the day in 1918 that Flag of Estonia, previously used by pro-independence activists, is formally adopted as national flag of the Republic of Estonia.