25818113 has 4 divisors (see below), whose sum is σ = 25850160. Its totient is φ = 25786068.

The previous prime is 25818109. The next prime is 25818139. The reversal of 25818113 is 31181852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25818113 - 2² = 25818109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25818173) 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, 14783 + ... + 16436.

It is an arithmetic number, because the mean of its divisors is an integer number (6462540).

Almost surely, 2^25818113 is an apocalyptic number.

It is an amenable number.

25818113 is a deficient number, since it is larger than the sum of its proper divisors (32047).

25818113 is an equidigital number, since it uses as much as digits as its factorization.

25818113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32046.

The product of its digits is 1920, while the sum is 29.

The square root of 25818113 is about 5081.1527235461. The cubic root of 25818113 is about 295.5571697378.

Adding to 25818113 its reverse (31181852), we get a palindrome (56999965).

The spelling of 25818113 in words is "twenty-five million, eight hundred eighteen thousand, one hundred thirteen".