Fatto matematico: 23575 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 23575 is a boring number.
Data storica: July 17th is the day in 1918 that the RMS Carpathia, the ship that rescued the 705 survivors from the RMS Titanic, is sunk off Ireland by the German SM U-55; 5 lives are lost.