General fact: 235 is the atomic mass number of an important isotope of the element uranium, the fissile isotope which is used as the fuel for nuclear reactors and in some nuclear weapons.
Mathematical fact: 235 is the number of trees with 11 vertices.
Trivia: 235 is the number of three interstate highways in the United States, located in the states of Iowa, Kansas, and Oklahoma.
Historical date: August 22nd is the day in 1961 that Ida Siekmann died attempting to cross the Berlin Wall.