25945831 has 4 divisors (see below), whose sum is σ = 25992000. Its totient is φ = 25899664.

The previous prime is 25945823. The next prime is 25945837. The reversal of 25945831 is 13854952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25945831 - 2³ = 25945823 is a prime.

It is a super-2 number, since 2×25945831² = 1346372292561122, which 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 (25945837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22231 + ... + 23368.

It is an arithmetic number, because the mean of its divisors is an integer number (6498000).

Almost surely, 2^25945831 is an apocalyptic number.

25945831 is a deficient number, since it is larger than the sum of its proper divisors (46169).

25945831 is an equidigital number, since it uses as much as digits as its factorization.

25945831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46168.

The product of its digits is 43200, while the sum is 37.

The square root of 25945831 is about 5093.7050366114. The cubic root of 25945831 is about 296.0437260397.

The spelling of 25945831 in words is "twenty-five million, nine hundred forty-five thousand, eight hundred thirty-one".