25345521331 has 16 divisors (see below), whose sum is σ = 27526794400. Its totient is φ = 23336131104.

The previous prime is 25345521319. The next prime is 25345521349. The reversal of 25345521331 is 13312554352.

It is not a de Polignac number, because 25345521331 - 2³³ = 16755586739 is a prime.

It is a super-2 number, since 2×25345521331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25345521931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857680 + ... + 886738.

It is an arithmetic number, because the mean of its divisors is an integer number (1720424650).

Almost surely, 2^25345521331 is an apocalyptic number.

25345521331 is a deficient number, since it is larger than the sum of its proper divisors (2181273069).

25345521331 is an equidigital number, since it uses as much as digits as its factorization.

25345521331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29495 (or 29469 counting only the distinct ones).

The product of its digits is 54000, while the sum is 34.

The spelling of 25345521331 in words is "twenty-five billion, three hundred forty-five million, five hundred twenty-one thousand, three hundred thirty-one".