25564313 has 4 divisors (see below), whose sum is σ = 25576320. Its totient is φ = 25552308.

The previous prime is 25564309. The next prime is 25564349. The reversal of 25564313 is 31346552.

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, 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 25564313 - 2² = 25564309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25564303) 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, 1853 + ... + 7386.

It is an arithmetic number, because the mean of its divisors is an integer number (6394080).

Almost surely, 2^25564313 is an apocalyptic number.

It is an amenable number.

25564313 is a deficient number, since it is larger than the sum of its proper divisors (12007).

25564313 is an equidigital number, since it uses as much as digits as its factorization.

25564313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12006.

The product of its digits is 10800, while the sum is 29.

The square root of 25564313 is about 5056.1163950210. The cubic root of 25564313 is about 294.5855061713.

The spelling of 25564313 in words is "twenty-five million, five hundred sixty-four thousand, three hundred thirteen".