216022568 has 8 divisors (see below), whose sum is σ = 405042330. Its totient is φ = 108011280.

The previous prime is 216022561. The next prime is 216022603. The reversal of 216022568 is 865220612.

It can be written as a sum of positive squares in only one way, i.e., 198866404 + 17156164 = 14102^2 + 4142^2 .

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

It is not an unprimeable number, because it can be changed into a prime (216022561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13501403 + ... + 13501418.

Almost surely, 2^216022568 is an apocalyptic number.

It is an amenable number.

216022568 is a deficient number, since it is larger than the sum of its proper divisors (189019762).

216022568 is a wasteful number, since it uses less digits than its factorization.

216022568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27002827 (or 27002823 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 216022568 is about 14697.7062155970. The cubic root of 216022568 is about 600.0208955686.

The spelling of 216022568 in words is "two hundred sixteen million, twenty-two thousand, five hundred sixty-eight".