25798631 has 4 divisors (see below), whose sum is σ = 26162064. Its totient is φ = 25435200.

The previous prime is 25798601. The next prime is 25798649. The reversal of 25798631 is 13689752.

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 25798631 - 2⁶ = 25798567 is a prime.

It is a super-2 number, since 2×25798631² = 1331138722948322, 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 (25798601) 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, 181610 + ... + 181751.

It is an arithmetic number, because the mean of its divisors is an integer number (6540516).

Almost surely, 2^25798631 is an apocalyptic number.

25798631 is a deficient number, since it is larger than the sum of its proper divisors (363433).

25798631 is an equidigital number, since it uses as much as digits as its factorization.

25798631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363432.

The product of its digits is 90720, while the sum is 41.

The square root of 25798631 is about 5079.2352770865. The cubic root of 25798631 is about 295.4828098791.

The spelling of 25798631 in words is "twenty-five million, seven hundred ninety-eight thousand, six hundred thirty-one".