CREATE TABLE table_255829_1 (population__2010_ VARCHAR, no_of_barangays VARCHAR)

What is the 2010 population of the municipality with 31 barangays?
SELECT population__2010_ FROM table_255829_1 WHERE no_of_barangays = 31
SELECT "population__2010_" FROM "table_255829_1" WHERE "no_of_barangays" = 31