Number 54

A page of the Numeropedia - the Special Encyclopedia of Numbers

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[Astronomy]  The average period (years) that eclipses tend to repeat at a location on the Earth: 3 Saros cycles (about 54 years 1 month) or approximately 19756 days.

[Chemistry]  The atomic number of Xenon (Xe).

[Geology]  The number of national parks in the U.S., as of 1997.

[Math.]  Three square numbers using the same digits:

362 = 1,296, 542 = 2,916 and 962 = 9216.

[Math.]  544 = 8,503,056 = (8+5+0+30+5+6)4

545 = 459,165,024 = (4+5+9+1+6+5+0+24)5

546 = 24,794,911,296 = (2+4+7+9+4+9+1+1+2+9+6)6

548 = 72,301,961,339,136 = (7+2+3+0+1+9+6+1+3+3+9+1+3+6)8

549 = 3,904,305,912,313,344 = (3+9+0+4+3+0+5+9+1+2+3+1+3+3+4+4)9.

[Math.]

987,654,321×09 = 08,888,888,889

987,654,321×18 = 17,777,777,778

987,654,321×27 = 26,666,666,667

987,654,321×36 = 35,555,555,556

987,654,321×45 = 44,444,444,445

987,654,321×54 = 53,333,333,334

987,654,321×63 = 62,222,222,223

987,654,321×72 = 71,111,111,112

987,654,321×81 = 80,000,000,001.

[Money]  A MasterCard credit card number starts with either 2 digits 51, 52, 53, 54 or 55.

[Phone]  International telephone dialing code for Argentina.

[Science]

 American British Number (no entry) septendecillion 10102 septendecillion nonillion 1054 nonillion quintillion 1030 quintillion trillion 1018 trillion billion 1012 billion milliard 109

[Tech.]  The “number system” code of an EAN-13 barcode for Belgium and Luxembourg’s products.

[Trivia]  The value of one of a few English word “LIV”, as a Roman numeral.

[World]  The flag of the British Commonwealth (of 54 independent countries) displays a yellow globe at the center on a blue background, encircling by 81 yellow lines forming letter C.

[History]  The 1844 Democratic presidential candidate James K. Polk’s famous campaign slogan, “Fifty-Four Forty or Fight!”, referring to the conflict with Canada over the line of latitude serving as the northern boundary of Oregon state at 54o40’.