25564216 has 16 divisors (see below), whose sum is σ = 48358800. Its totient is φ = 12668544.

The previous prime is 25564213. The next prime is 25564219. The reversal of 25564216 is 61246552.

It is an interprime number because it is at equal distance from previous prime (25564213) and next prime (25564219).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25564213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13236 + ... + 15043.

It is an arithmetic number, because the mean of its divisors is an integer number (3022425).

Almost surely, 2^25564216 is an apocalyptic number.

It is an amenable number.

25564216 is a deficient number, since it is larger than the sum of its proper divisors (22794584).

25564216 is a wasteful number, since it uses less digits than its factorization.

25564216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28398 (or 28394 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 25564216 is about 5056.1068026694. The cubic root of 25564216 is about 294.5851335838.

The spelling of 25564216 in words is "twenty-five million, five hundred sixty-four thousand, two hundred sixteen".