216332986 has 16 divisors (see below), whose sum is σ = 339609024. Its totient is φ = 103157824.

The previous prime is 216332983. The next prime is 216333037. The reversal of 216332986 is 689233612.

It is not an unprimeable number, because it can be changed into a prime (216332981) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 9186 + ... + 22738.

It is an arithmetic number, because the mean of its divisors is an integer number (21225564).

Almost surely, 2^216332986 is an apocalyptic number.

216332986 is a deficient number, since it is larger than the sum of its proper divisors (123276038).

216332986 is a wasteful number, since it uses less digits than its factorization.

216332986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13925.

The product of its digits is 93312, while the sum is 40.

The square root of 216332986 is about 14708.2625078559. The cubic root of 216332986 is about 600.3081620702.

The spelling of 216332986 in words is "two hundred sixteen million, three hundred thirty-two thousand, nine hundred eighty-six".