25971216 has 40 divisors (see below), whose sum is σ = 67287360. Its totient is φ = 8631936.

The previous prime is 25971203. The next prime is 25971217. The reversal of 25971216 is 61217952.

It is not an unprimeable number, because it can be changed into a prime (25971217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23901 + ... + 24963.

It is an arithmetic number, because the mean of its divisors is an integer number (1682184).

Almost surely, 2^25971216 is an apocalyptic number.

It is an amenable number.

25971216 is an abundant number, since it is smaller than the sum of its proper divisors (41316144).

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

25971216 is a wasteful number, since it uses less digits than its factorization.

25971216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1577 counting only the distinct ones).

The product of its digits is 7560, while the sum is 33.

The square root of 25971216 is about 5096.1962285611. The cubic root of 25971216 is about 296.1402427716.

The spelling of 25971216 in words is "twenty-five million, nine hundred seventy-one thousand, two hundred sixteen".