Hecho general: 243 is the number of isotopes or variations of elements calculated by Dr. Plichta.
Hecho matemático: 243 is the sum of five consecutive prime numbers (41 + 43 + 47 + 53 + 59).
Trivia: 243 is the number of isotopes or variations of elements calculated by Dr. Plichta.
Fecha histórica: August 30th is the day in 1974 that a Belgrade–Dortmund express train derails at the main train station in Zagreb killing 153 passengers.