22505656 has 8 divisors (see below), whose sum is σ = 42198120. Its totient is φ = 11252824.

The previous prime is 22505627. The next prime is 22505663. The reversal of 22505656 is 65650522.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406596 + ... + 1406611.

It is an arithmetic number, because the mean of its divisors is an integer number (5274765).

Almost surely, 2^22505656 is an apocalyptic number.

It is an amenable number.

22505656 is a deficient number, since it is larger than the sum of its proper divisors (19692464).

22505656 is a wasteful number, since it uses less digits than its factorization.

22505656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813213 (or 2813209 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 22505656 is about 4744.0126475379. The cubic root of 22505656 is about 282.3344622370.

The spelling of 22505656 in words is "twenty-two million, five hundred five thousand, six hundred fifty-six".