The Republic of Indonesia is a country in Southeast Asia. Comprising 17,508 islands, it is the world's largest archipelagic state. With a population of 222 million people in 2006, it is the world's fourth most populous country and the most populous Muslim-majority nation; however, no reference is made to Islam in the Indonesian constitution. Indonesia is a republic, with an elected legislature and president. The nation's capital city is Jakarta. The country shares land borders with Papua New Guinea, East Timor and Malaysia. Other neighboring countries include Singapore, the Philippines, Australia, and the Indian territory of the Andaman and Nicobar Islands.