225522931 has 2 divisors, whose sum is σ = 225522932. Its totient is φ = 225522930.

The previous prime is 225522907. The next prime is 225522943. The reversal of 225522931 is 139225522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225522931 is a prime.

It is a super-2 number, since 2×225522931² = 101721184813661522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 225522893 and 225522902.

It is not a weakly prime, because it can be changed into another prime (225522971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112761465 + 112761466.

It is an arithmetic number, because the mean of its divisors is an integer number (112761466).

Almost surely, 2^225522931 is an apocalyptic number.

225522931 is a deficient number, since it is larger than the sum of its proper divisors (1).

225522931 is an equidigital number, since it uses as much as digits as its factorization.

225522931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 225522931 is about 15017.4209170550. The cubic root of 225522931 is about 608.6910308343.

The spelling of 225522931 in words is "two hundred twenty-five million, five hundred twenty-two thousand, nine hundred thirty-one".