215011211 has 2 divisors, whose sum is σ = 215011212. Its totient is φ = 215011210.

The previous prime is 215011193. The next prime is 215011261. The reversal of 215011211 is 112110512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215011211 - 2²⁶ = 147902347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215011261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107505605 + 107505606.

It is an arithmetic number, because the mean of its divisors is an integer number (107505606).

Almost surely, 2^215011211 is an apocalyptic number.

215011211 is a deficient number, since it is larger than the sum of its proper divisors (1).

215011211 is an equidigital number, since it uses as much as digits as its factorization.

215011211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 215011211 is about 14663.2605855587. The cubic root of 215011211 is about 599.0830540270.

Adding to 215011211 its reverse (112110512), we get a palindrome (327121723).

The spelling of 215011211 in words is "two hundred fifteen million, eleven thousand, two hundred eleven".