Finland's first billionaire ranked 773rd on the list, a spot shared with 54 other of the world's rich.
Mexican tycoon Carlos Slim is the world's wealthiest person, knocking Microsoft founder Bill Gates into second spot, as the wealth of the world's billionaires grew by 50 percent over the last year, Forbes magazine said on Wednesday.
It is only the second time since 1995 that Gates has lost the crown, the magazine said, estimating Slim's net worth at $53.5 billion, compared to Gates's $53 billion fortune, while investor Warren Buffett came in at No. 3 with $47 billion.
The trio regained $41.5 billion of the $68 billion they had lost the previous year, Forbes said.
The number of billionaires around the world has nearly recovered in 2010 after dropping by a third last year during the global financial crisis. There are now 1,011 billionaires, compared with 793 last year.
