2191

Number
$2191$ (two thousand, one hundred and ninety-one) is:
 * $7 \times 313$


 * The $8$th term of a sequence of $17$ consecutive integers all of which are not coprime with the product of the other $16$:
 * $2191 \not \perp \displaystyle \prod_{\substack {2184 \mathop \le k \mathop \le 2200 \\ k \mathop \ne 2191} } k$