22320656 has 20 divisors (see below), whose sum is σ = 43394172. Its totient is φ = 11122176.

The previous prime is 22320653. The next prime is 22320667. The reversal of 22320656 is 65602322.

It can be written as a sum of positive squares in 2 ways, for example, as 5837056 + 16483600 = 2416^2 + 4060^2 .

It is a super-3 number, since 3×22320656³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22320653) 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, 2780 + ... + 7236.

Almost surely, 2^22320656 is an apocalyptic number.

It is an amenable number.

22320656 is a deficient number, since it is larger than the sum of its proper divisors (21073516).

22320656 is a wasteful number, since it uses less digits than its factorization.

22320656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778 (or 4772 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 22320656 is about 4724.4741506331. The cubic root of 22320656 is about 281.5587216742.

Adding to 22320656 its reverse (65602322), we get a palindrome (87922978).

The spelling of 22320656 in words is "twenty-two million, three hundred twenty thousand, six hundred fifty-six".