Arab League Pakistan Population 423,000,000 210,440,005 Area 13,333,296 km² (5,148,048 sq mi) 881,913 km² (340,509 sq mi) Population density 27.17/km2 (70.4/sq mi) 240.3/km² (555/sq mi) Capital Cairo Islamabad Largest city Cairo – 20,439,541 Karachi – 24,300,000 Organisation and government type Regional organisation and Political union Islamic republic and Federal Parliamentary republic Official languages Arabic Urdu and English Main religions 91% Islam, 5.8% Christianity, 4% Others 97% Islam (80-95% Sunni, 5-20% Shi'a), 1.2% Christianity, 1.2% Hinduism, 0.6% others GDP (nominal) $3.526 trillion ($4,239 per capita) $285.525 billion ($1,410 per capita)