25217255 has 16 divisors (see below), whose sum is σ = 35429184. Its totient is φ = 16869120.

The previous prime is 25217233. The next prime is 25217279. The reversal of 25217255 is 55271252.

It is not a de Polignac number, because 25217255 - 2⁶ = 25217191 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7352 + ... + 10221.

It is an arithmetic number, because the mean of its divisors is an integer number (2214324).

Almost surely, 2^25217255 is an apocalyptic number.

25217255 is a deficient number, since it is larger than the sum of its proper divisors (10211929).

25217255 is a wasteful number, since it uses less digits than its factorization.

25217255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17626.

The product of its digits is 7000, while the sum is 29.

The square root of 25217255 is about 5021.6785042454. The cubic root of 25217255 is about 293.2463420016.

The spelling of 25217255 in words is "twenty-five million, two hundred seventeen thousand, two hundred fifty-five".