216211 has 2 divisors, whose sum is σ = 216212. Its totient is φ = 216210.

The previous prime is 216179. The next prime is 216217. The reversal of 216211 is 112612.

216211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216211 - 2⁵ = 216179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216191 and 216200.

It is not a weakly prime, because it can be changed into another prime (216217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108105 + 108106.

It is an arithmetic number, because the mean of its divisors is an integer number (108106).

2²¹⁶²¹¹ is an apocalyptic number.

216211 is a deficient number, since it is larger than the sum of its proper divisors (1).

216211 is an equidigital number, since it uses as much as digits as its factorization.

216211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24, while the sum is 13.

The square root of 216211 is about 464.9849459929. The cubic root of 216211 is about 60.0195306789.

Adding to 216211 its reverse (112612), we get a palindrome (328823).

The spelling of 216211 in words is "two hundred sixteen thousand, two hundred eleven".