Fatto generale: 55267 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 55267 is an unremarkable number.
Trivia: 55267 is a boring number.
Data storica: April 25th is the day in 1134 that the name Zagreb was mentioned for the first time in the Felician Charter relating to the establishment of the Zagreb Bishopric around 1094.