216320330 has 16 divisors (see below), whose sum is σ = 390818304. Its totient is φ = 86207760.

The previous prime is 216320317. The next prime is 216320341. The reversal of 216320330 is 33023612.

It is a super-3 number, since 3×216320330³ (a number of 26 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 37202 + ... + 42621.

It is an arithmetic number, because the mean of its divisors is an integer number (24426144).

Almost surely, 2^216320330 is an apocalyptic number.

216320330 is a deficient number, since it is larger than the sum of its proper divisors (174497974).

216320330 is a wasteful number, since it uses less digits than its factorization.

216320330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80101.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 216320330 is about 14707.8322671970. The cubic root of 216320330 is about 600.2964553514.

Adding to 216320330 its reverse (33023612), we get a palindrome (249343942).

The spelling of 216320330 in words is "two hundred sixteen million, three hundred twenty thousand, three hundred thirty".