216166308 has 24 divisors (see below), whose sum is σ = 504870912. Its totient is φ = 71986464.

The previous prime is 216166297. The next prime is 216166333. The reversal of 216166308 is 803661612.

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, 5341 + ... + 21467.

It is an arithmetic number, because the mean of its divisors is an integer number (21036288).

Almost surely, 2^216166308 is an apocalyptic number.

It is an amenable number.

216166308 is an abundant number, since it is smaller than the sum of its proper divisors (288704604).

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

216166308 is a wasteful number, since it uses less digits than its factorization.

216166308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17251 (or 17249 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 216166308 is about 14702.5952811060. The cubic root of 216166308 is about 600.1539493848.

The spelling of 216166308 in words is "two hundred sixteen million, one hundred sixty-six thousand, three hundred eight".