505 = 12 + 3 × 4 + 56 × 7 + 89
505 = 9 + 8 + 7 × 65 + 4 × 3 + 21
505 = 0^7 + 1^9 − 2^5 − 3^8 + 4^6 + 5^0 + 6^1 + 7^4 + 8^3 + 9^2
505 = 8^2 + 21^2 = 12^2 + 19^2
505^2 = 217^2 + 456^2 = 336^2 + 377^2
505 divides 91^4 - 1.
Semiprime (Product of 2 Primes)
Factors: 1, 5, 101, 505
Representations, Binary to Hexadecimal:
111111001_2
200201_3
13321_4
4010_5
2201_6
1321_7
771_8
621_9
41a_11
361_12
2cb_13
281_14
23a_15
1f9_16
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Undergraduate Texts in Mathematics
Graduate Studies in Mathematics

