What is 203 divisible by?

203 is not divisible by 2 because it is an odd number. It is not divisible by 3 because the sum of its digits (2+0+3 = 5) is not divisible by 3. It is not divisible by 5 because it does not end in 0 or 5. It is not divisible by 7 or 11 either. Therefore, 203 is not divisible by any of the common prime numbers.