25564255 has 4 divisors (see below), whose sum is σ = 30677112. Its totient is φ = 20451400.

The previous prime is 25564237. The next prime is 25564261. The reversal of 25564255 is 55246552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25564255 - 2⁵ = 25564223 is a prime.

It is a super-2 number, since 2×25564255² = 1307062267410050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25564255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556421 + ... + 2556430.

It is an arithmetic number, because the mean of its divisors is an integer number (7669278).

Almost surely, 2^25564255 is an apocalyptic number.

25564255 is a deficient number, since it is larger than the sum of its proper divisors (5112857).

25564255 is an equidigital number, since it uses as much as digits as its factorization.

25564255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112856.

The product of its digits is 60000, while the sum is 34.

The square root of 25564255 is about 5056.1106593903. The cubic root of 25564255 is about 294.5852833871.

The spelling of 25564255 in words is "twenty-five million, five hundred sixty-four thousand, two hundred fifty-five".