Fatto generale: 15053 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 15053 is an unremarkable number.
Trivia: 15053 is an uninteresting number.
Data storica: March 18th is the day in 235 that Emperor Alexander Severus and his mother Julia Mamaea are murdered by legionaries near Moguntiacum (modern Mainz).