Fatto matematico: 5214 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 5214 is an unremarkable number.
Data storica: April 10th is the day in 1992 that the Maraghar Massacre, killing of ethnic Armenian civil population of the village Maraghar by Azerbaijani troops during the Nagorno-Karabakh War.