22185656 has 8 divisors (see below), whose sum is σ = 41598120. Its totient is φ = 11092824.

The previous prime is 22185623. The next prime is 22185671. The reversal of 22185656 is 65658122.

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1386596 + ... + 1386611.

It is an arithmetic number, because the mean of its divisors is an integer number (5199765).

Almost surely, 2^22185656 is an apocalyptic number.

It is an amenable number.

22185656 is a deficient number, since it is larger than the sum of its proper divisors (19412464).

22185656 is a wasteful number, since it uses less digits than its factorization.

22185656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773213 (or 2773209 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 22185656 is about 4710.1651775707. The cubic root of 22185656 is about 280.9899313777.

The spelling of 22185656 in words is "twenty-two million, one hundred eighty-five thousand, six hundred fifty-six".