Find the next number in the series 211, 227, 233, 241, ___________.

Let's analyze the numbers in the series: 211, 227, 233, 241 are all prime numbers.
Let's list the consecutive prime numbers starting from 211:

* 211 (Given)
* 223 (Skipped)
* 227 (Given)
* 229 (Skipped)
* 233 (Given)
* 239 (Skipped)
* 241 (Given)

The pattern is that every alternate prime number is chosen.
The prime numbers following 241 are:

* 251 (Should be skipped)
* 257 (Next alternate prime)

Therefore, the next number in the series is 257.