22216864 has 12 divisors (see below), whose sum is σ = 43739514. Its totient is φ = 11108416.

The previous prime is 22216861. The next prime is 22216891. The reversal of 22216864 is 46861222.

It can be written as a sum of positive squares in only one way, i.e., 21715600 + 501264 = 4660^2 + 708^2 .

It is not an unprimeable number, because it can be changed into a prime (22216861) by changing a digit.

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 as a sum of consecutive naturals, namely, 347107 + ... + 347170.

Almost surely, 2^22216864 is an apocalyptic number.

It is an amenable number.

22216864 is a deficient number, since it is larger than the sum of its proper divisors (21522650).

22216864 is an equidigital number, since it uses as much as digits as its factorization.

22216864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694287 (or 694279 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 22216864 is about 4713.4768483573. The cubic root of 22216864 is about 281.1216234526.

The spelling of 22216864 in words is "twenty-two million, two hundred sixteen thousand, eight hundred sixty-four".