India ranks No 6 in the Hurun Global Rich List 2013 pecking order with 53 billionaires.
Mukesh Ambani ($20.5 billion and ranked 27), the richest Indian, held on to the position as owner of the world’s most expensive home.
The $1.8-billion structure rises to 27 floors, and has nine elevators, six floors for parking and three helipads, the Hurun report said.
Subhash Chandra ($3.1 billion, ranked 450) once a one-time rice trader in Haryana is now credited with launching India's satellite television revolution.
Health care is the preferred sector followed by technology, media and telecom and real estate.
Mumbai is headquarters to most billionaires, followed by Delhi and Bangalore.
India also has a high number of billionaires residing overseas, including L.N. Mittal (London), S. P. Hinduja and Family (London), Micky Jagtiani (Dubai), Anil Agarwal (London), Aloke Lohia (Bangkok), Kavitha Ram Shriram (California), Romesh T. Wadhwani (California), Manoj Bhargava (Michigan), Sri Prakash Lohia (London), and Vinod Khosla (California).
Dubai-based M.A. Yusuffali of Emke Group of Companies is a new entrant to the list.