25813825 has 12 divisors (see below), whose sum is σ = 32462208. Its totient is φ = 20358800.

The previous prime is 25813813. The next prime is 25813847. The reversal of 25813825 is 52831852.

It is not a de Polignac number, because 25813825 - 2¹¹ = 25811777 is a prime.

It is a super-2 number, since 2×25813825² = 1332707122261250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5497 + ... + 9046.

It is an arithmetic number, because the mean of its divisors is an integer number (2705184).

Almost surely, 2^25813825 is an apocalyptic number.

25813825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25813825 is a deficient number, since it is larger than the sum of its proper divisors (6648383).

25813825 is a wasteful number, since it uses less digits than its factorization.

25813825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14624 (or 14619 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 25813825 is about 5080.7307545273. The cubic root of 25813825 is about 295.5408062993.

The spelling of 25813825 in words is "twenty-five million, eight hundred thirteen thousand, eight hundred twenty-five".