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_name_38 ( area__km_2__ INTEGER, name VARCHAR, population__2011_ VARCHAR )

### Question ###
For Stellenbosch, which has a population larger than 155,733, what is the average area?

### Accurate SQL ###

SELECT AVG(area__km_2__) FROM table_name_38 WHERE name = "stellenbosch" AND population__2011_ > 155 OFFSET 733