25331216 has 20 divisors (see below), whose sum is σ = 50663424. Its totient is φ = 12256800.

The previous prime is 25331213. The next prime is 25331227. The reversal of 25331216 is 61213352.

25331216 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 25331191 and 25331200.

It is not an unprimeable number, because it can be changed into a prime (25331213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25040 + ... + 26031.

Almost surely, 2^25331216 is an apocalyptic number.

It is an amenable number.

25331216 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25331216 is a wasteful number, since it uses less digits than its factorization.

25331216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51110 (or 51104 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 25331216 is about 5033.0126167138. The cubic root of 25331216 is about 293.6874213459.

Adding to 25331216 its reverse (61213352), we get a palindrome (86544568).

The spelling of 25331216 in words is "twenty-five million, three hundred thirty-one thousand, two hundred sixteen".