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_10 (area_km_2 INTEGER, official_name VARCHAR, population VARCHAR)

### Question ###
What is the Area of the Allardville Parish with a Population smaller than 2,151?

### Accurate SQL ###

SELECT SUM(area_km_2) FROM table_name_10 WHERE official_name = "allardville" AND population < 2 OFFSET 151