25850217 has 16 divisors (see below), whose sum is σ = 36616320. Its totient is φ = 16165632.

The previous prime is 25850197. The next prime is 25850221. The reversal of 25850217 is 71205852.

It is not a de Polignac number, because 25850217 - 2¹⁰ = 25849193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25850257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19188 + ... + 20490.

It is an arithmetic number, because the mean of its divisors is an integer number (2288520).

Almost surely, 2^25850217 is an apocalyptic number.

It is an amenable number.

25850217 is a deficient number, since it is larger than the sum of its proper divisors (10766103).

25850217 is a wasteful number, since it uses less digits than its factorization.

25850217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 25850217 is about 5084.3108677578. The cubic root of 25850217 is about 295.6796243001.

The spelling of 25850217 in words is "twenty-five million, eight hundred fifty thousand, two hundred seventeen".