33

Did you know…

• 33 is the largest positive integer that can not be expressed as a sum of different triangular numbers.
• Alexander the Great died at the age of thirty-three
• 33 is the atomic number of arsenic
• Famous athletes who’ve worn the number include: Larry Bird, Patrick Ewing, Patrick Roy, and Tony Dorsett
• A normal human spine has 33 vertebrae when the bones that form the coccyx are counted individually
• Anyone born on April 21, 1974 is 33 today - Happy Birthday

The facts on thirty-three, via wikipedia.