It's about the number of Countries in Africa.
In other words, the count of Countries in Africa is 1 times 53.(2016 figures) (sovereign states recognized by the UN only)
It's about one-and-one-tenth times the number of Teeth in a Great White Shark's Mouth.
In other words, the count of Teeth in a Great White Shark's Mouth is 0.91 times 53.(Carcharodon carcharias) (average; including developing rows)
It's about three-fourths the number of Submarines in the US Navy.
It's about three-fifths the number of Keys on a Piano.
It's about one-and-nine-tenths times the number of Countries in the European Union.
In other words, the count of Countries in the European Union is 0.53 times 53.(a.k.a. EU) (2016 figures)
It's about half the number of Wolves in Yellowstone National Park.
In other words, 53 is 0.51 times the count of Wolves in Yellowstone National Park, and the count of Wolves in Yellowstone National Park is 1.96 times that amount.(a.k.a. Henihco'oo; a.k.a. Héetíhco'oo) (December 2014 figures; Wyoming Park area)
As of the 2014 population count, there were 104 wolves living in Yellowstone National Park, in twelve packs. All of the wolves now living in the Park are thought to have descended from the 66 wolves (re)introduced into the Park in 1995-96.
It's about two-fifths the number of Elements on the Periodic Table.
In other words, 53 is 0.449 times the count of Elements on the Periodic Table, and the count of Elements on the Periodic Table is 2.23 times that amount.(a.k.a. Periodic Table of the Elements, a.k.a chemical elements) (confirmed elements as of 2016)