225310431 has 4 divisors (see below), whose sum is σ = 300413912. Its totient is φ = 150206952.

The previous prime is 225310391. The next prime is 225310441. The reversal of 225310431 is 134013522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 225310431 - 2¹⁰ = 225309407 is a prime.

It is a super-2 number, since 2×225310431² = 101529580634811522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225310398 and 225310407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225310441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37551736 + ... + 37551741.

It is an arithmetic number, because the mean of its divisors is an integer number (75103478).

Almost surely, 2^225310431 is an apocalyptic number.

225310431 is a deficient number, since it is larger than the sum of its proper divisors (75103481).

225310431 is an equidigital number, since it uses as much as digits as its factorization.

225310431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75103480.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 225310431 is about 15010.3441332969. The cubic root of 225310431 is about 608.4997901318.

Adding to 225310431 its reverse (134013522), we get a palindrome (359323953).

The spelling of 225310431 in words is "two hundred twenty-five million, three hundred ten thousand, four hundred thirty-one".