216022806 has 48 divisors (see below), whose sum is σ = 478954944. Its totient is φ = 70342272.

The previous prime is 216022691. The next prime is 216022813. The reversal of 216022806 is 608220612.

216022806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216022806² = 93331705424227272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216022806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349810 + ... + 350426.

It is an arithmetic number, because the mean of its divisors is an integer number (9978228).

Almost surely, 2^216022806 is an apocalyptic number.

216022806 is an abundant number, since it is smaller than the sum of its proper divisors (262932138).

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

216022806 is a wasteful number, since it uses less digits than its factorization.

216022806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 216022806 is about 14697.7143120963. The cubic root of 216022806 is about 600.0211159235.

The spelling of 216022806 in words is "two hundred sixteen million, twenty-two thousand, eight hundred six".