Other traits Musk apparently possesses include orderliness, self-discipline, self-efficacy and being cooperative.
Paysa performed a similar analysis of Facebook CEO Mark Zuckerberg's personality and found that his top trait is also intellect. As with Musk, emotionality and immoderation appear in Zuckerberg's top five. That suggests that these characteristics may help a leader succeed in Silicon Valley.
To arrive at these results, Paysa "gathered speeches, essays, books, the transcripts of interviews and other forms of communication produced by those highlighted above." It put over 2,500 words "through the Watson Personality Insights API."
"Personality Insights extracts personality characteristics based on how a person writes," according to IBM Watson's website. "You can use the service to match individuals to other individuals, opportunities, and products, or tailor their experience with personalized messaging and recommendations."
It makes sense that Musk, an avid reader known for his ability to come up with otherworldly ideas and then pursue them with vigor, earned high marks for his intellect, emotionality and self-discipline.
Musk has also expressed that he wants his work to help the world prepare for a brighter tomorrow, a key marker of his altruism. "I'm just trying to think about the future," says Musk in a recent TED Talk, "and not be sad."
Like this story? Like CNBC Make It on Facebook.
See also: Mark Zuckerberg, Satya Nadella and Bill Gates share this crucial personality trait for achieving success