Which number president was John F. Kennedy?

In what year did Dwight D. Eisenhower first take office as President? Under which president did Richard Nixon serve as Vice President? Who was First Lady during Dwight D. Eisenhower's presidency? Mamie Eisenhower was married to which president? Who succeeded John F. Kennedy as President of the United States? Who was President immediately before John F. Kennedy? Which political party did President John F. Kennedy belong to? Which president served from 1961 to 1963?