25222216 has 32 divisors (see below), whose sum is σ = 48898080. Its totient is φ = 12188800.

The previous prime is 25222213. The next prime is 25222229. The reversal of 25222216 is 61222252.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25222213) 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, 42675 + ... + 43261.

It is an arithmetic number, because the mean of its divisors is an integer number (1528065).

Almost surely, 2^25222216 is an apocalyptic number.

It is an amenable number.

25222216 is a deficient number, since it is larger than the sum of its proper divisors (23675864).

25222216 is a wasteful number, since it uses less digits than its factorization.

25222216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 761 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 25222216 is about 5022.1724382980. The cubic root of 25222216 is about 293.2655708948.

Adding to 25222216 its reverse (61222252), we get a palindrome (86444468).

The spelling of 25222216 in words is "twenty-five million, two hundred twenty-two thousand, two hundred sixteen".