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_2972 ( "April 2013 Cum. Rank" real, "Name" text, "Rank (all) 2012" real, "Rank (all) 2013" real, "2013 Rank (oil companies)" text, "2013 rev (bil. USD )" text, "2013 Profit (mil. USD )" real, "Assets (bil. USD )" text, "Market cap March 15 (mil. USD )" real )

### Question ###
How many assets in billions US$, for the company that ranked 1532 overall in 2013?

### Accurate SQL ###

SELECT "Assets (bil. USD )" FROM table_2972 WHERE "Rank (all) 2013" = '1532'