25218472 has 32 divisors (see below), whose sum is σ = 50047200. Its totient is φ = 11880000.

The previous prime is 25218449. The next prime is 25218493. The reversal of 25218472 is 27481252.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37822 + ... + 38482.

It is an arithmetic number, because the mean of its divisors is an integer number (1563975).

Almost surely, 2^25218472 is an apocalyptic number.

It is an amenable number.

25218472 is a deficient number, since it is larger than the sum of its proper divisors (24828728).

25218472 is a wasteful number, since it uses less digits than its factorization.

25218472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 933 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 25218472 is about 5021.7996774065. The cubic root of 25218472 is about 293.2510593410.

The spelling of 25218472 in words is "twenty-five million, two hundred eighteen thousand, four hundred seventy-two".