533

533 = 13 x 41.

533 is the number of degree sequences for graphs with five vertices.

533 has two representations as a sum of two squares: 533 = 2² + 23² = 7² + 22².

533 is the hypotenuse of two primitive Pythagorean triples: 533² = 92² + 525² = 308² + 435².

533 is 201202 in base 4. It is 191 in base 19.

533 is the sum of three consecutive primes: 533 = 173 + 179 + 181. It is also the sum of five consecutive primes: 533 = 101 + 103 + 107 + 109 + 113.

Source: What's Special About This Number?