216972208 has 10 divisors (see below), whose sum is σ = 420383684. Its totient is φ = 108486096.

The previous prime is 216972187. The next prime is 216972227. The reversal of 216972208 is 802279612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6780366 + ... + 6780397.

Almost surely, 2^216972208 is an apocalyptic number.

It is an amenable number.

216972208 is a deficient number, since it is larger than the sum of its proper divisors (203411476).

216972208 is a wasteful number, since it uses less digits than its factorization.

216972208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13560771 (or 13560765 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 216972208 is about 14729.9765105040. The cubic root of 216972208 is about 600.8988453818.

The spelling of 216972208 in words is "two hundred sixteen million, nine hundred seventy-two thousand, two hundred eight".