Wednesday, February 3, 2010
481
481
= 13 x 37.
481
has two representations as a sum of two squares:
481
= 9
2
+ 20
2
= 15
2
+ 16
2
.
481
is the hypotenuse of two primitive Pythagorean triples:
481
2
= 31
2
+ 480
2
= 319
2
+ 360
2
.
481
is an
octagonal number
.
The Great Pyramid of Giza in Egypt is
481
feet high.
Source:
WolframAlpha
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