25799531 has 4 divisors (see below), whose sum is σ = 26689200. Its totient is φ = 24909864.

The previous prime is 25799513. The next prime is 25799551. The reversal of 25799531 is 13599752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25799531 is a prime.

It is a super-2 number, since 2×25799531² = 1331231599639922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25799551) 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, 444791 + ... + 444848.

It is an arithmetic number, because the mean of its divisors is an integer number (6672300).

Almost surely, 2^25799531 is an apocalyptic number.

25799531 is a deficient number, since it is larger than the sum of its proper divisors (889669).

25799531 is an equidigital number, since it uses as much as digits as its factorization.

25799531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889668.

The product of its digits is 85050, while the sum is 41.

The square root of 25799531 is about 5079.3238723279. The cubic root of 25799531 is about 295.4862458681.

The spelling of 25799531 in words is "twenty-five million, seven hundred ninety-nine thousand, five hundred thirty-one".