425315231 has 24 divisors (see below), whose sum is σ = 495586416. Its totient is φ = 361912320.

The previous prime is 425315213. The next prime is 425315239. The reversal of 425315231 is 132513524.

It is a happy number.

It is not a de Polignac number, because 425315231 - 2⁶ = 425315167 is a prime.

It is a super-2 number, since 2×425315231² = 361786091441166722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 425315231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425315239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1071125 + ... + 1071521.

It is an arithmetic number, because the mean of its divisors is an integer number (20649434).

Almost surely, 2^425315231 is an apocalyptic number.

425315231 is a deficient number, since it is larger than the sum of its proper divisors (70271185).

425315231 is a wasteful number, since it uses less digits than its factorization.

425315231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 762 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 425315231 is about 20623.1721856750. The cubic root of 425315231 is about 752.0331388888.

Adding to 425315231 its reverse (132513524), we get a palindrome (557828755).

The spelling of 425315231 in words is "four hundred twenty-five million, three hundred fifteen thousand, two hundred thirty-one".