225724351431 has 16 divisors (see below), whose sum is σ = 306711533664. Its totient is φ = 147611278464.

The previous prime is 225724351429. The next prime is 225724351453. The reversal of 225724351431 is 134153427522.

It is not a de Polignac number, because 225724351431 - 2¹ = 225724351429 is a prime.

It is a super-2 number, since 2×225724351431² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225724351431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225724350431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584205 + ... + 890361.

It is an arithmetic number, because the mean of its divisors is an integer number (19169470854).

Almost surely, 2^225724351431 is an apocalyptic number.

225724351431 is a deficient number, since it is larger than the sum of its proper divisors (80987182233).

225724351431 is a wasteful number, since it uses less digits than its factorization.

225724351431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310850.

The product of its digits is 201600, while the sum is 39.

Adding to 225724351431 its reverse (134153427522), we get a palindrome (359877778953).

The spelling of 225724351431 in words is "two hundred twenty-five billion, seven hundred twenty-four million, three hundred fifty-one thousand, four hundred thirty-one".