It’s official. Sheryl Sandberg is now a billionaire. With an estimated $1.05 billion wealth, Facebook’s chief operating officer makes her first appearance on Forbes magazine’s annual list of the world’s billionaires.

Sandberg, who published her first book, Lean In, last year, is one of just 172 women who are billionaires among the world’s three-and-a-half billion women. As Forbes noted, she’s also a self-made billionaire, meaning that she’s not wealthy because of who she married or who she has in her family tree. It’s because of what she’s done. That distinction puts her in pretty exclusive company — Oprah Winfrey, Sara Blakely, Tory Burch, and Meg Whitman are some of the other American women on Forbes’ list who made it on her own.

One billion is an impressive number, but it’s not the only impressive number that defines Sandberg. Here’s Sheryl Sandberg, by the numbers.

1,540 – Sandberg’s rank on Forbes’ list of the world’s 1,645 billionaires.

42 – Number of women to join the billionaires list this year.

50 – Number of weeks that Sandberg’s book “Lean In: Women, Work, and the Will to Lead” (with Nell Scovell) has been on The New York Times best seller list.

750 million – The number of people who visit Facebook every day.

76 – Percent increase in Facebook’s advertising revenue last year.

$20.3 million – Amount that Sandberg received when she sold 283,344 Class-A Facebook shares in mid-March.

$658.4 million – Value of the 9,515,734 Facebook shares that Sandberg still owns at Tuesday’s $69.19 closing price.

$104 billion – Facebook’s value when it went public on May 18, 2012.

$176 billion – Facebook’s value on March 18, 2014.

7 – Years in a row that Sandberg has been named one of the 50 most powerful women in business by Fortune magazine (she joined the list in 2007).

4 – Jobs that Sandberg has held since earning her MBA from Harvard. Before joining Facebook in 2008, Sandberg was a management consultant with McKinsey & Co., served as chief of staff to Treasury Secretary Lawrence H. Summers, and was a vice president at Google (Yahoo’s future CEO Marissa Mayer also worked at Google.).

6 – Boards on which Sandberg serves. These include Facebook, Walt Disney, Women for Women International, V-Day, and ONE. She’s also chairman of the board of LeanIn.

44 – Sandberg’s age. The Washington, D.C., native will turn 45 on August 28.

2 – Number of children that Sandberg has with her husband, Dave Goldberg, the CEO of SurveyMonkey.

1 – Words that Sandberg would like to ban. Along with pop star Beyonce, former Secretary of State Condoleeza Rice, and Girl Scout CEO Anna Maria Chavez, Sandberg is out to ban the word “bossy” from our vocabulary (See #banbossy on Twitter).

23 – Number of female CEOs among the Fortune 500 companies.

0 – Times that Sandberg has been a CEO. As long as Sandberg remains at Facebook, she’s likely to be stuck at number two behind Facebook co-founder, Mark Zuckerberg.