Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_2293510_1 ( region___nuts_2006_ VARCHAR, ppp__million_€_ VARCHAR )

### Question ###
Where is the PPP 23164 million ?

### Accurate SQL ###

SELECT region___nuts_2006_ FROM table_2293510_1 WHERE ppp__million_€_ = 23164