It's weird, because the number is off by an order of magnitude. "If you count all of the varieties of today’s Arabic together, you can safely estimate that there are about 313 million Arabic speakers in the whole world, making it the fifth most-spoken language globally behind Mandarin, Spanish, English and Hindi." [1]
[1] https://www.babbel.com/en/magazine/how-many-people-speak-ara...