22717216 has 12 divisors (see below), whose sum is σ = 44724582. Its totient is φ = 11358592.

The previous prime is 22717207. The next prime is 22717229. The reversal of 22717216 is 61271722.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 7817616 = 3860^2 + 2796^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354925 + ... + 354988.

Almost surely, 2^22717216 is an apocalyptic number.

It is an amenable number.

22717216 is a deficient number, since it is larger than the sum of its proper divisors (22007366).

22717216 is an equidigital number, since it uses as much as digits as its factorization.

22717216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709923 (or 709915 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 22717216 is about 4766.2580710658. The cubic root of 22717216 is about 283.2163811053.

Adding to 22717216 its reverse (61271722), we get a palindrome (83988938).

The spelling of 22717216 in words is "twenty-two million, seven hundred seventeen thousand, two hundred sixteen".