25163813 has 4 divisors (see below), whose sum is σ = 25183200. Its totient is φ = 25144428.

The previous prime is 25163783. The next prime is 25163821. The reversal of 25163813 is 31836152.

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 25163813 - 2¹⁰ = 25162789 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 (25163833) 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, 7595 + ... + 10392.

It is an arithmetic number, because the mean of its divisors is an integer number (6295800).

Almost surely, 2^25163813 is an apocalyptic number.

It is an amenable number.

25163813 is a deficient number, since it is larger than the sum of its proper divisors (19387).

25163813 is a wasteful number, since it uses less digits than its factorization.

25163813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19386.

The product of its digits is 4320, while the sum is 29.

The square root of 25163813 is about 5016.3545528601. The cubic root of 25163813 is about 293.0390400984.

Adding to 25163813 its reverse (31836152), we get a palindrome (56999965).

The spelling of 25163813 in words is "twenty-five million, one hundred sixty-three thousand, eight hundred thirteen".