155 = 12 + 3 + 4 + 5 + 6 × 7 + 89
155 = 9 × 8 + 7 + 6 × 5 + 43 + 2 + 1
155 = 0^7 + 1^9 − 2^5 − 3^8 + 4^6 + 5^2 + 6^3 + 7^4 + 8^1 + 9^0
155 divides 61^2 - 1.
Toothpick sequence a(n), n = 15
The ring of integers of the field Q(sqrt(-155)) has class number 4.
Semiprime (Product of 2 Primes)
Factors: 1, 5, 31, 155
One hundred fifty-five
Representations, Binary to Hexadecimal:
10011011_2
12202_3
2123_4
1110_5
415_6
311_7
233_8
182_9
131_11
10b_12
bc_13
b1_14
a5_15
9b_16
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