22216866 has 16 divisors (see below), whose sum is σ = 50781504. Its totient is φ = 6347664.

The previous prime is 22216861. The next prime is 22216891. The reversal of 22216866 is 66861222.

It is not an unprimeable number, because it can be changed into a prime (22216861) 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, 264445 + ... + 264528.

It is an arithmetic number, because the mean of its divisors is an integer number (3173844).

Almost surely, 2^22216866 is an apocalyptic number.

22216866 is an abundant number, since it is smaller than the sum of its proper divisors (28564638).

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

22216866 is a wasteful number, since it uses less digits than its factorization.

22216866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528985.

The product of its digits is 13824, while the sum is 33.

The square root of 22216866 is about 4713.4770605149. The cubic root of 22216866 is about 281.1216318883.

The spelling of 22216866 in words is "twenty-two million, two hundred sixteen thousand, eight hundred sixty-six".