216450216 has 48 divisors (see below), whose sum is σ = 587146560. Its totient is φ = 72036000.

The previous prime is 216450197. The next prime is 216450233. The reversal of 216450216 is 612054612.

216450216 is a `hidden beast` number, since 2 + 1 + 645 + 0 + 2 + 16 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 216450216.

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 11 ways as a sum of consecutive naturals, for example, 52071 + ... + 56073.

It is an arithmetic number, because the mean of its divisors is an integer number (12232220).

Almost surely, 2^216450216 is an apocalyptic number.

It is an amenable number.

216450216 is an abundant number, since it is smaller than the sum of its proper divisors (370696344).

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

216450216 is a wasteful number, since it uses less digits than its factorization.

216450216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4766 (or 4759 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 216450216 is about 14712.2471431118. The cubic root of 216450216 is about 600.4165773719.

The spelling of 216450216 in words is "two hundred sixteen million, four hundred fifty thousand, two hundred sixteen".