How much is 517?
It's about four times the number of Union Stations in the United States
The count of Union Stations in the United States is about 135.
(a.k.a. Union Terminal; a.k.a. Joint Station; a.k.a. Union Depot) (2016 figures)
It's about one-fourth the number of Steps in the Sears Tower
The count of Steps in the Sears Tower is about 2,109.
(a.k.a. Willis Tower) (Chicago, Illinois) (steps per stairwell)
It's about one-fourth the number of Daily Newspapers in Circulation Worldwide
The count of Daily Newspapers in Circulation Worldwide is about 2,111.
(2013 figures) (regional and local, plus national figures; paid only)
It's about four-and-a-half times the number of Elements on the Periodic Table
The count of Elements on the Periodic Table is about 118.
(a.k.a. Periodic Table of the Elements, a.k.a chemical elements) (confirmed elements as of 2016)
From element number one, hydrogen, to element one-hundred eighteen, ununoctium, there are 118 confirmed elements on the Periodic Table. Ninety-four of the elements exist in nature, and the remaining twenty-four have only been synthesized in labs (not having occurred naturally in the time since scientists have begun researching them)
It's about five times the number of Wolves in Yellowstone National Park
The count of Wolves in Yellowstone National Park is about 104.
(a.k.a. Henihco'oo; a.k.a. Héetíhco'oo) (December 2014 figures; Wyoming Park area)
It's about seven times the number of Submarines in the US Navy
The count of Submarines in the US Navy is about 72.
(a.k.a. Subs) (includes all types, all classes) (2015 figures)
It's about nine times the number of Countries in Africa
The count of Countries in Africa is about 56.
(2016 figures) (sovereign states recognized by the UN only)
It's about one-tenth the number of Bishops in the Catholic Church
The count of Bishops in the Catholic Church is about 5,352.
(2015 figures; total Latin and Eastern Church figures; including Pope)
It's about eleven times the number of Teeth in a Great White Shark's Mouth
The count of Teeth in a Great White Shark's Mouth is about 48.
(Carcharodon carcharias) (average; including developing rows)
It's about one-fifteenth the number of Blue Whales in the World
The count of Blue Whales in the World is about 8,500.
(Balaenoptera musculus) (2002 estimates)
It's about one-fifteenth the number of Benches in Central Park
The count of Benches in Central Park is about 9,000.
(Manhattan, New York City, New York)
It's about one-twentieth the number of Written Characters in the Chinese Language
The count of Written Characters in the Chinese Language is about 9,353.
(zhōngwén, 中文) (Hànzì, 汉字/漢字; Shuowen Jiezi count; distinct characters)
It's about nineteen times the number of Countries in the European Union
The count of Countries in the European Union is about 27.
(a.k.a. EU) (2016 figures)
It's about thirty times the number of Living Kings and Queens
The count of Living Kings and Queens is about 15.
(2015 figures) (distinct Monarchs)