25013445431 has 16 divisors (see below), whose sum is σ = 28596685824. Its totient is φ = 21674325504.

The previous prime is 25013445427. The next prime is 25013445433. The reversal of 25013445431 is 13454431052.

It is not a de Polignac number, because 25013445431 - 2² = 25013445427 is a prime.

It is a super-2 number, since 2×25013445431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25013445433) 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, 63116 + ... + 232401.

It is an arithmetic number, because the mean of its divisors is an integer number (1787292864).

Almost surely, 2^25013445431 is an apocalyptic number.

25013445431 is a deficient number, since it is larger than the sum of its proper divisors (3583240393).

25013445431 is a wasteful number, since it uses less digits than its factorization.

25013445431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295930.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 25013445431 its reverse (13454431052), we get a palindrome (38467876483).

The spelling of 25013445431 in words is "twenty-five billion, thirteen million, four hundred forty-five thousand, four hundred thirty-one".