25817255 has 4 divisors (see below), whose sum is σ = 30980712. Its totient is φ = 20653800.

The previous prime is 25817227. The next prime is 25817261. The reversal of 25817255 is 55271852.

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

It is not a de Polignac number, because 25817255 - 2⁶ = 25817191 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 2581721 + ... + 2581730.

It is an arithmetic number, because the mean of its divisors is an integer number (7745178).

Almost surely, 2^25817255 is an apocalyptic number.

25817255 is a deficient number, since it is larger than the sum of its proper divisors (5163457).

25817255 is an equidigital number, since it uses as much as digits as its factorization.

25817255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163456.

The product of its digits is 28000, while the sum is 35.

The square root of 25817255 is about 5081.0682931840. The cubic root of 25817255 is about 295.5538956687.

The spelling of 25817255 in words is "twenty-five million, eight hundred seventeen thousand, two hundred fifty-five".