Fatto generale: 81143 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 81143 is a boring number.
Trivia: 81143 is an uninteresting number.
Data storica: February 28th is the day in 1939 that the erroneous word "dord" is discovered in the Webster's New International Dictionary, Second Edition, prompting an investigation.