Donald Trump is the first billionaire to serve as president of the United States — here's how he spends his $3.1 billion fortune, from his 24-karat gold-plated helicopter to the $350,000 in annual alimony to his first wife

• Donald Trump, with a net worth of $3.1 billion according to Forbes, is the first billionaire in history to serve as president of the United States.
• From his New York real estate to his golf clubs around the world, he rakes in millions of dollars of revenue annually.
• Here's how Trump spends his fortune.

Donald Trump is worth an estimated $3.1 billion, according to Forbes, making him the first billionaire in US history to serve as president.

From emblazoning a private helicopter in 24-karat gold, right down to the seatbelts, to a 100-cabin yacht dubbed "Trump Princess," here's how the real-estate titan spends his fortune.

Forbes currently estimates Donald Trump's net worth to be $3.1 billion, a $400 million drop since he took presidential office in January 2017.

Source: Forbes

During his presidential campaign, Trump claimed he had a net worth of $10 billion —three times as much as it really was.

Source: Business Insider and Time

Still, he's made history as the first billionaire to serve as President of the United States.

Source: Time