general_fact: 5158 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 5158 is an uninteresting number.
trivia: 5158 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: February 13th is the day in 1961 that a 500,000-year-old rock is discovered near Olancha, California, US, that appears to anachronistically encase a spark plug.