Five hundred three
513 is an odd number.
513 is a Harshad number, which means it is divisible by the sum of its digits (5 + 1 + 3 = 9, and 513 is divisible by 9).
In binary, 513 is represented as 1000000001.
In hex, 513 is represented as 201.
Prime factorization of 513: 33 * 19.