Which number president was Harry S. Truman?

Under which president did Henry A. Wallace serve as Vice President? Under which president did Harry S. Truman serve as Vice President? Who was First Lady during Franklin D. Roosevelt's presidency? Eleanor Roosevelt was married to which president? Who succeeded Harry S. Truman as President of the United States? Who was President immediately before Harry S. Truman? Which political party did President Harry S. Truman belong to? Which president served from 1945 to 1953?