Fatto matematico: 58483 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 58483 is an unremarkable number.
Data storica: February 13th is the day in 2004 that the Harvard-Smithsonian Center for Astrophysics announces the discovery of the universe's largest known diamond, white dwarf star BPM 37093.