5221

5221 is a positive integer. In mathematics, it factorizes as 23 × 227, so it is a semiprime. Its positive divisors are 1, 23, 227, and 5221. The number is odd, not a prime, and not a perfect power. The sum of its decimal digits is 10, giving a digital root of 1. It is congruent to 1 modulo 4 and is between 7! and 8! in value.

In various representations, 5221 appears as 0x1465 in hexadecimal and as 1010001100101 in binary. The decimal digits are 5, 2, 2, and 1, and the hexadecimal digits are 1, 4, 6, and 5. The binary form confirms the composition from the prime factors 23 and 227.

A number theory note: since both prime factors 23 and 227 are congruent to 3 modulo 4, 5221 cannot be expressed as a sum of two squares, by Fermat’s theorem on sums of two squares. The total count of positive divisors of 5221 is four: 1, 23, 227, and 5221.