22561056 has 216 divisors, whose sum is σ = 79881984. Its totient is φ = 5909760.

The previous prime is 22561051. The next prime is 22561067. The reversal of 22561056 is 65016522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22561051) 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 in 35 ways as a sum of consecutive naturals, for example, 727761 + ... + 727791.

It is an arithmetic number, because the mean of its divisors is an integer number (369824).

Almost surely, 2^22561056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22561056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39940992).

22561056 is an abundant number, since it is smaller than the sum of its proper divisors (57320928).

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

22561056 is a wasteful number, since it uses less digits than its factorization.

22561056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22561056 is about 4749.8479975679. The cubic root of 22561056 is about 282.5659375675.

Adding to 22561056 its reverse (65016522), we get a palindrome (87577578).

The spelling of 22561056 in words is "twenty-two million, five hundred sixty-one thousand, fifty-six".