22205656 has 32 divisors (see below), whose sum is σ = 45722880. Its totient is φ = 10026400.

The previous prime is 22205639. The next prime is 22205657. The reversal of 22205656 is 65650222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22205657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13941 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^22205656 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 22205656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22861440).

22205656 is an abundant number, since it is smaller than the sum of its proper divisors (23517224).

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

22205656 is a wasteful number, since it uses less digits than its factorization.

22205656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 22205656 is about 4712.2877671042. The cubic root of 22205656 is about 281.0743419349.

Adding to 22205656 its reverse (65650222), we get a palindrome (87855878).

The spelling of 22205656 in words is "twenty-two million, two hundred five thousand, six hundred fifty-six".