25295795231 has 6 divisors (see below), whose sum is σ = 29425721040. Its totient is φ = 21682110156.

The previous prime is 25295795227. The next prime is 25295795243. The reversal of 25295795231 is 13259759252.

It is not a de Polignac number, because 25295795231 - 2² = 25295795227 is a prime.

It is a super-2 number, since 2×25295795231² (a number of 22 digits) 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 25295795231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25295795221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258120311 + ... + 258120408.

It is an arithmetic number, because the mean of its divisors is an integer number (4904286840).

Almost surely, 2^25295795231 is an apocalyptic number.

25295795231 is a deficient number, since it is larger than the sum of its proper divisors (4129925809).

25295795231 is an equidigital number, since it uses as much as digits as its factorization.

25295795231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516240733 (or 516240726 counting only the distinct ones).

The product of its digits is 1701000, while the sum is 50.

The spelling of 25295795231 in words is "twenty-five billion, two hundred ninety-five million, seven hundred ninety-five thousand, two hundred thirty-one".