25798831 has 4 divisors (see below), whose sum is σ = 25808992. Its totient is φ = 25788672.

The previous prime is 25798813. The next prime is 25798837. The reversal of 25798831 is 13889752.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25798831 - 2¹¹ = 25796783 is a prime.

It is a super-2 number, since 2×25798831² = 1331159361933122, 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 (25798837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2410 + ... + 7576.

It is an arithmetic number, because the mean of its divisors is an integer number (6452248).

Almost surely, 2^25798831 is an apocalyptic number.

25798831 is a deficient number, since it is larger than the sum of its proper divisors (10161).

25798831 is an equidigital number, since it uses as much as digits as its factorization.

25798831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160.

The product of its digits is 120960, while the sum is 43.

The square root of 25798831 is about 5079.2549650515. The cubic root of 25798831 is about 295.4835734391.

The spelling of 25798831 in words is "twenty-five million, seven hundred ninety-eight thousand, eight hundred thirty-one".