22115864 has 16 divisors (see below), whose sum is σ = 42897600. Its totient is φ = 10676512.

The previous prime is 22115839. The next prime is 22115887. The reversal of 22115864 is 46851122.

It is a super-2 number, since 2×22115864² = 978222880932992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47432 + ... + 47895.

It is an arithmetic number, because the mean of its divisors is an integer number (2681100).

Almost surely, 2^22115864 is an apocalyptic number.

It is an amenable number.

22115864 is a deficient number, since it is larger than the sum of its proper divisors (20781736).

22115864 is a wasteful number, since it uses less digits than its factorization.

22115864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95362 (or 95358 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 22115864 is about 4702.7506844399. The cubic root of 22115864 is about 280.6949742915.

Adding to 22115864 its reverse (46851122), we get a palindrome (68966986).

The spelling of 22115864 in words is "twenty-two million, one hundred fifteen thousand, eight hundred sixty-four".