216320232 has 64 divisors (see below), whose sum is σ = 560332800. Its totient is φ = 69520320.

The previous prime is 216320219. The next prime is 216320233. The reversal of 216320232 is 232023612.

It is a junction number, because it is equal to n+sod(n) for n = 216320199 and 216320208.

It is not an unprimeable number, because it can be changed into a prime (216320233) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 356073 + ... + 356679.

It is an arithmetic number, because the mean of its divisors is an integer number (8755200).

Almost surely, 2^216320232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216320232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280166400).

216320232 is an abundant number, since it is smaller than the sum of its proper divisors (344012568).

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

216320232 is a wasteful number, since it uses less digits than its factorization.

216320232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 216320232 is about 14707.8289356383. The cubic root of 216320232 is about 600.2963647003.

Adding to 216320232 its reverse (232023612), we get a palindrome (448343844).

The spelling of 216320232 in words is "two hundred sixteen million, three hundred twenty thousand, two hundred thirty-two".