225164431 has 2 divisors, whose sum is σ = 225164432. Its totient is φ = 225164430.

The previous prime is 225164419. The next prime is 225164437. The reversal of 225164431 is 134461522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225164431 - 2⁵ = 225164399 is a prime.

It is a super-2 number, since 2×225164431² = 101398041975107522, which contains 22 as substring.

It is equal to p_12391390 and since 225164431 and 12391390 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225164431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225164437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112582215 + 112582216.

It is an arithmetic number, because the mean of its divisors is an integer number (112582216).

Almost surely, 2^225164431 is an apocalyptic number.

225164431 is a deficient number, since it is larger than the sum of its proper divisors (1).

225164431 is an equidigital number, since it uses as much as digits as its factorization.

225164431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 28.

The square root of 225164431 is about 15005.4800323082. The cubic root of 225164431 is about 608.3683268209.

The spelling of 225164431 in words is "two hundred twenty-five million, one hundred sixty-four thousand, four hundred thirty-one".