216006220 has 12 divisors (see below), whose sum is σ = 453613104. Its totient is φ = 86402480.

The previous prime is 216006209. The next prime is 216006227. The reversal of 216006220 is 22600612.

It is not an unprimeable number, because it can be changed into a prime (216006227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5400136 + ... + 5400175.

It is an arithmetic number, because the mean of its divisors is an integer number (37801092).

Almost surely, 2^216006220 is an apocalyptic number.

216006220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216006220 is an abundant number, since it is smaller than the sum of its proper divisors (237606884).

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

216006220 is a wasteful number, since it uses less digits than its factorization.

216006220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10800320 (or 10800318 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 216006220 is about 14697.1500638729. The cubic root of 216006220 is about 600.0057592040.

Adding to 216006220 its reverse (22600612), we get a palindrome (238606832).

The spelling of 216006220 in words is "two hundred sixteen million, six thousand, two hundred twenty".