25185216 has 84 divisors (see below), whose sum is σ = 77544168. Its totient is φ = 7193088.

The previous prime is 25185179. The next prime is 25185221. The reversal of 25185216 is 61258152.

It is a tau number, because it is divible by the number of its divisors (84).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8070 + ... + 10746.

Almost surely, 2^25185216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25185216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38772084).

25185216 is an abundant number, since it is smaller than the sum of its proper divisors (52358952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25185216 is a wasteful number, since it uses less digits than its factorization.

25185216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706 (or 2689 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 25185216 is about 5018.4874215245. The cubic root of 25185216 is about 293.1220976916.

The spelling of 25185216 in words is "twenty-five million, one hundred eighty-five thousand, two hundred sixteen".