25103813 has 4 divisors (see below), whose sum is σ = 28690080. Its totient is φ = 21517548.

The previous prime is 25103791. The next prime is 25103839. The reversal of 25103813 is 31830152.

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 25103813 - 2²⁰ = 24055237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25103413) 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, 1793123 + ... + 1793136.

It is an arithmetic number, because the mean of its divisors is an integer number (7172520).

Almost surely, 2^25103813 is an apocalyptic number.

It is an amenable number.

25103813 is a deficient number, since it is larger than the sum of its proper divisors (3586267).

25103813 is an equidigital number, since it uses as much as digits as its factorization.

25103813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586266.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 25103813 is about 5010.3705451793. The cubic root of 25103813 is about 292.8059496250.

Adding to 25103813 its reverse (31830152), we get a palindrome (56933965).

The spelling of 25103813 in words is "twenty-five million, one hundred three thousand, eight hundred thirteen".