22216724 has 24 divisors (see below), whose sum is σ = 40870368. Its totient is φ = 10553760.

The previous prime is 22216673. The next prime is 22216751. The reversal of 22216724 is 42761222.

It is a junction number, because it is equal to n+sod(n) for n = 22216693 and 22216702.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4619 + ... + 8109.

It is an arithmetic number, because the mean of its divisors is an integer number (1702932).

Almost surely, 2^22216724 is an apocalyptic number.

It is an amenable number.

22216724 is a deficient number, since it is larger than the sum of its proper divisors (18653644).

22216724 is a wasteful number, since it uses less digits than its factorization.

22216724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575 (or 3573 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 22216724 is about 4713.4619973009. The cubic root of 22216724 is about 281.1210329536.

Adding to 22216724 its reverse (42761222), we get a palindrome (64977946).

The spelling of 22216724 in words is "twenty-two million, two hundred sixteen thousand, seven hundred twenty-four".