216344166 has 16 divisors (see below), whose sum is σ = 434597184. Its totient is φ = 71796584.

The previous prime is 216344153. The next prime is 216344189. The reversal of 216344166 is 661443612.

216344166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78060 + ... + 80783.

It is an arithmetic number, because the mean of its divisors is an integer number (27162324).

Almost surely, 2^216344166 is an apocalyptic number.

216344166 is an abundant number, since it is smaller than the sum of its proper divisors (218253018).

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

216344166 is a wasteful number, since it uses less digits than its factorization.

216344166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159075.

The product of its digits is 20736, while the sum is 33.

The square root of 216344166 is about 14708.6425614331. The cubic root of 216344166 is about 600.3185031186.

Adding to 216344166 its reverse (661443612), we get a palindrome (877787778).

The spelling of 216344166 in words is "two hundred sixteen million, three hundred forty-four thousand, one hundred sixty-six".