216630211 has 8 divisors (see below), whose sum is σ = 247670624. Its totient is φ = 185613120.

The previous prime is 216630209. The next prime is 216630217. The reversal of 216630211 is 112036612.

216630211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216630211 - 2¹ = 216630209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216630217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24871 + ... + 32431.

It is an arithmetic number, because the mean of its divisors is an integer number (30958828).

Almost surely, 2^216630211 is an apocalyptic number.

216630211 is a deficient number, since it is larger than the sum of its proper divisors (31040413).

216630211 is an equidigital number, since it uses as much as digits as its factorization.

216630211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11661.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 216630211 is about 14718.3630543617. The cubic root of 216630211 is about 600.5829621122.

Adding to 216630211 its reverse (112036612), we get a palindrome (328666823).

The spelling of 216630211 in words is "two hundred sixteen million, six hundred thirty thousand, two hundred eleven".