Africa has 54 fully recognized sovereign countries according to the UN
1.Algeria (~2.38 million km²) 2.Democratic Republic of the Congo (~2.34 million km²) 3.Sudan (~1.86 million km²) 4.Libya (~1.76 million km²) 5.Chad (~1.28 million km²) 6.Niger (~1.27 million km²) 7.Angola (~1.25 million km²)
South Africa is the richest country in Africa by total Gross Domestic Product (GDP), with an economy valued at roughly $480 billion. Because "wealth" can be measured in different ways, the answer changes depending on whether you look at total economic size or individual wealth.
The Seychelles is the smallest country in Africa by both total land area and population