25564199 has 2 divisors, whose sum is σ = 25564200. Its totient is φ = 25564198.

The previous prime is 25564183. The next prime is 25564213. The reversal of 25564199 is 99146552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25564199 - 2⁴ = 25564183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25564129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12782099 + 12782100.

It is an arithmetic number, because the mean of its divisors is an integer number (12782100).

Almost surely, 2^25564199 is an apocalyptic number.

25564199 is a deficient number, since it is larger than the sum of its proper divisors (1).

25564199 is an equidigital number, since it uses as much as digits as its factorization.

25564199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 25564199 is about 5056.1051215338. The cubic root of 25564199 is about 294.5850682849.

The spelling of 25564199 in words is "twenty-five million, five hundred sixty-four thousand, one hundred ninety-nine".