216201320 has 16 divisors (see below), whose sum is σ = 486453060. Its totient is φ = 86480512.

The previous prime is 216201301. The next prime is 216201329. The reversal of 216201320 is 23102612.

216201320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 213685924 + 2515396 = 14618^2 + 1586^2 .

It is not an unprimeable number, because it can be changed into a prime (216201329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2702477 + ... + 2702556.

Almost surely, 2^216201320 is an apocalyptic number.

216201320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216201320 is an abundant number, since it is smaller than the sum of its proper divisors (270251740).

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

216201320 is a wasteful number, since it uses less digits than its factorization.

216201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405044 (or 5405040 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 216201320 is about 14703.7859070377. The cubic root of 216201320 is about 600.1863495245.

Adding to 216201320 its reverse (23102612), we get a palindrome (239303932).

The spelling of 216201320 in words is "two hundred sixteen million, two hundred one thousand, three hundred twenty".