165 = 12 × 3 + 45 + 67 + 8 + 9
165 = 9 × 8 + 7 × 6 + 5 + 43 + 2 + 1
165 = 0^4 + 1^8 + 2^6 − 3^9 + 4^7 + 5^5 + 6^3 + 7^2 + 8^1 + 9^0
165 = binomial(9 + 2, 3) is the 9th tetrahedral number.
165 divides 34^2 - 1.
165 = 11 × (11 + 1 + 1 + 1 + 1)
165 = 2 × 22 + (22/2)2
165 = (3 + 3) × 33 + 3
165 = 4 × 44 − 44/4
165 = 5 + 5 × ((5 + 5)/5)5
165 = 66 × (6 × 6 − 6)/(6 + 6)
165 = 77 × (7 + 7 + 7/7)/7
165 = 88 + 88 − 88/8
165 = 9 × (9 + 9) + (9 + 9 + 9)/9
Sphenic number: Product of 3 distinct Primes, (List)
a(n) = 1^2 + 3^2 + 5^2 + 7^2 + ... + (2*n-1)^2 = n*(4*n^2 - 1)/3. n = 5
Number of prime knots with 10 crossings.
Factors: 1, 3, 5, 11, 15, 33, 55, 165
one hundred sixty-five
Representations, Binary to Hexadecimal:
10100101_2
20010_3
2211_4
1130_5
433_6
324_7
245_8
203_9
140_11
119_12
c9_13
bb_14
b0_15
a5_16
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