Fatto generale: 81388 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 81388 is a boring number.
Trivia: 81388 is an uninteresting number.
Data storica: October 31st is the day in 1863 that the Maori Wars resumes as British forces in New Zealand led by General Duncan Cameron begin their Invasion of the Waikato.