225384431 has 2 divisors, whose sum is σ = 225384432. Its totient is φ = 225384430.

The previous prime is 225384377. The next prime is 225384437. The reversal of 225384431 is 134483522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225384431 - 2²² = 221190127 is a prime.

It is a super-2 number, since 2×225384431² = 101596283474387522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225384437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112692215 + 112692216.

It is an arithmetic number, because the mean of its divisors is an integer number (112692216).

Almost surely, 2^225384431 is an apocalyptic number.

225384431 is a deficient number, since it is larger than the sum of its proper divisors (1).

225384431 is an equidigital number, since it uses as much as digits as its factorization.

225384431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 32.

The square root of 225384431 is about 15012.8088977380. The cubic root of 225384431 is about 608.5664005346.

Subtracting from 225384431 its reverse (134483522), we obtain a palindrome (90900909).

The spelling of 225384431 in words is "two hundred twenty-five million, three hundred eighty-four thousand, four hundred thirty-one".