216663222 has 16 divisors (see below), whose sum is σ = 440671680. Its totient is φ = 70996872.

The previous prime is 216663199. The next prime is 216663233. The reversal of 216663222 is 222366612.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 216663222.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 305668 + ... + 306375.

It is an arithmetic number, because the mean of its divisors is an integer number (27541980).

Almost surely, 2^216663222 is an apocalyptic number.

216663222 is an abundant number, since it is smaller than the sum of its proper divisors (224008458).

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

216663222 is a wasteful number, since it uses less digits than its factorization.

216663222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612107.

The product of its digits is 10368, while the sum is 30.

The square root of 216663222 is about 14719.4844339060. The cubic root of 216663222 is about 600.6134669944.

The spelling of 216663222 in words is "two hundred sixteen million, six hundred sixty-three thousand, two hundred twenty-two".