216635056 has 20 divisors (see below), whose sum is σ = 457888104. Its totient is φ = 98470400.

The previous prime is 216635039. The next prime is 216635057. The reversal of 216635056 is 650536612.

216635056 is digitally balanced in base 2, 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 (216635057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615265 + ... + 615616.

Almost surely, 2^216635056 is an apocalyptic number.

It is an amenable number.

216635056 is an abundant number, since it is smaller than the sum of its proper divisors (241253048).

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

216635056 is a wasteful number, since it uses less digits than its factorization.

216635056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230900 (or 1230894 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 216635056 is about 14718.5276437557. The cubic root of 216635056 is about 600.5874394852.

The spelling of 216635056 in words is "two hundred sixteen million, six hundred thirty-five thousand, fifty-six".