Comoros

The official name of the country is the Union of the Comoros, and it is an island country situated in the Indian Ocean. Since the nation covers the entire island, the only borders they have are maritime with such countries as Madagascar, Mayotte, Tanzania, Mozambique, and Seychelles. 

The total land coverage of the island is 1,861 square kilometers, which ranks them at the bottom 50 of countries in terms of size. However, because the estimated 900,000 people living there, their density is quite considerate - 457 Comorians per square kilometers. As far as the economy is concerned, their total GDP is $2.446 billion (including PPP factor).