23155556 has 12 divisors (see below), whose sum is σ = 40612992. Its totient is φ = 11551848.

The previous prime is 23155523. The next prime is 23155567. The reversal of 23155556 is 65555132.

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 in 3 ways as a sum of consecutive naturals, for example, 4400 + ... + 8103.

It is an arithmetic number, because the mean of its divisors is an integer number (3384416).

Almost surely, 2^23155556 is an apocalyptic number.

It is an amenable number.

23155556 is a deficient number, since it is larger than the sum of its proper divisors (17457436).

23155556 is a wasteful number, since it uses less digits than its factorization.

23155556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12970 (or 12968 counting only the distinct ones).

The product of its digits is 22500, while the sum is 32.

The square root of 23155556 is about 4812.0220282123. The cubic root of 23155556 is about 285.0263892667.

The spelling of 23155556 in words is "twenty-three million, one hundred fifty-five thousand, five hundred fifty-six".