25581255 has 16 divisors (see below), whose sum is σ = 46777344. Its totient is φ = 11694240.

The previous prime is 25581247. The next prime is 25581299. The reversal of 25581255 is 55218552.

It is not a de Polignac number, because 25581255 - 2³ = 25581247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121711 + ... + 121920.

It is an arithmetic number, because the mean of its divisors is an integer number (2923584).

Almost surely, 2^25581255 is an apocalyptic number.

25581255 is a deficient number, since it is larger than the sum of its proper divisors (21196089).

25581255 is a wasteful number, since it uses less digits than its factorization.

25581255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243646.

The product of its digits is 20000, while the sum is 33.

The square root of 25581255 is about 5057.7915140899. The cubic root of 25581255 is about 294.6505677741.

The spelling of 25581255 in words is "twenty-five million, five hundred eighty-one thousand, two hundred fifty-five".