Hecho general: 22198 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 22198 is an uninteresting number.
Trivia: 22198 is an unremarkable number.
Fecha histórica: October 9th is the day in 2009 that First lunar impact of the Centaur and LCROSS spacecrafts as part of NASA's Lunar Precursor Robotic Program.