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21361 = 41 × 521

21361 = 25^2 + 144^2 = 56^2 + 135^2

Sum of 2 Squares

21361 = 25^2 + 144^2

Sum of Two Fourth Powers

21361^2 = 7200^2 + 20111^2 = 15089^2 + 15120^2

21361 divides 25^10 - 1.

Factors: 1, 41, 521, 21361

Twenty-one thousand, three hundred sixty-one

Representations, Binary to Hexadecimal:

101001101110001_2
1002022011_3
11031301_4
1140421_5
242521_6
116164_7
51561_8
32264_9
1505a_11
10441_12
9952_13
7adb_14
64e1_15
5371_16

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