22216716 has 18 divisors (see below), whose sum is σ = 56159012. Its totient is φ = 7405560.

The previous prime is 22216673. The next prime is 22216751. The reversal of 22216716 is 61761222.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 22216716.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 308530 + ... + 308601.

Almost surely, 2^22216716 is an apocalyptic number.

It is an amenable number.

22216716 is an abundant number, since it is smaller than the sum of its proper divisors (33942296).

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

22216716 is a wasteful number, since it uses less digits than its factorization.

22216716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617141 (or 617136 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 22216716 is about 4713.4611486677. The cubic root of 22216716 is about 281.1209992107.

Adding to 22216716 its reverse (61761222), we get a palindrome (83977938).

The spelling of 22216716 in words is "twenty-two million, two hundred sixteen thousand, seven hundred sixteen".