Fatto generale: 55843 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 55843 is an unremarkable number.
Trivia: 55843 is an uninteresting number.
Data storica: November 21st is the day in 2004 that the second round of the Ukrainian presidential election is held, giving rise to massive protests and controversy over the election's integrity.