Fatto generale: 81143 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 81143 is an uninteresting number.
Trivia: 81143 is a boring number.
Data storica: February 28th is the day in 1827 that the Baltimore & Ohio Railroad is incorporated, becoming the first railroad in America offering commercial transportation of both people and freight.