216603056 has 20 divisors (see below), whose sum is σ = 423522000. Its totient is φ = 107307072.

The previous prime is 216603053. The next prime is 216603061. The reversal of 216603056 is 650306612.

216603056 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216603053) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 60356 + ... + 63843.

It is an arithmetic number, because the mean of its divisors is an integer number (21176100).

Almost surely, 2^216603056 is an apocalyptic number.

It is an amenable number.

216603056 is a deficient number, since it is larger than the sum of its proper divisors (206918944).

216603056 is a wasteful number, since it uses less digits than its factorization.

216603056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124316 (or 124310 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 216603056 is about 14717.4405383545. The cubic root of 216603056 is about 600.5578663330.

Adding to 216603056 its reverse (650306612), we get a palindrome (866909668).

The spelling of 216603056 in words is "two hundred sixteen million, six hundred three thousand, fifty-six".