1. It is a Harshad number divisible by sum of its digits.
63 ÷ (6 +3) = 7
2. On base 4 , it is a repeated digit number.
63 =(333)4
3. It is a 22 gonal number.
4. It is a Woodall number, named after H J Woodall. Numbers in the form of n x 2n – 1 is called Woodall number.
63 = 4 x 24 – 1
5. The atomic number of Europium is 63
6. It is a Kaprekar number for 2 digits. If we take any two digit number and reverse it , take the difference of two and repeat the process we get 63 at the end.
53 – 35 = 18 81 – 18 = 63
7. It is a Dealnnoy number. A Dealonnoy number D describes the number of paths from the southwest corner (0, 0) of a rectangular grid to the northeast corner (m, n), using only single steps north, northeast, or east. It is denoted by-
Dr Rajesh Kumar Thakur
rkthakur1974@gmail.com
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