22091216 has 20 divisors (see below), whose sum is σ = 48916512. Its totient is φ = 9467616.

The previous prime is 22091213. The next prime is 22091219. The reversal of 22091216 is 61219022.

It is an interprime number because it is at equal distance from previous prime (22091213) and next prime (22091219).

It is a junction number, because it is equal to n+sod(n) for n = 22091191 and 22091200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22091213) 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, 98510 + ... + 98733.

Almost surely, 2^22091216 is an apocalyptic number.

It is an amenable number.

22091216 is an abundant number, since it is smaller than the sum of its proper divisors (26825296).

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

22091216 is a wasteful number, since it uses less digits than its factorization.

22091216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197258 (or 197252 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 22091216 is about 4700.1293599219. The cubic root of 22091216 is about 280.5906578974.

The spelling of 22091216 in words is "twenty-two million, ninety-one thousand, two hundred sixteen".