227 is a Prime Number, Prime(49)
227 = 123 + 4 × 5 + 67 + 8 + 9
227 = 98 + 76 + 5 × 4 + 32 + 1
227 = 0^5 − 1^8 − 2^7 + 3^4 − 4^9 + 5^0 + 6^3 + 7^2 + 8^6 + 9^1
227 = (1 + 1) × (111 + 1 + 1) + 1:
Sexy Prime (Primes p such that p + 6 is also prime)
Prime number spiral (clockwise, Northwest spoke).
227 101--103--107--109--113--127 | | | 223 97 29---31---37---41 131 | | | | | 211 89 23 3----5 43 137 | | | | | | | 199 83 19 2 7 47 139 | | | | | | 197 79 17---13---11 53 149 | | | | 193 73---71---67---61---59 151 | | 191--181--179--173--167--163--157
Number of geometric 4-dimensional crystal classes.
Number k such that (7*10^k + 71)/3 is prime.
Prime of the form 4xk^2 + 163
Weak veryprime
a(n) = 3^n - 2^(n-1) , n = 5.
The ring of integers of the field Q(sqrt(-227)) has class number 5.
Factors: 1, 227
Two hundred twenty-seven
Representations, Binary to Hexadecimal:
11100011_2
22102_3
3203_4
1402_5
1015_6
443_7
343_8
272_9
197_11
16b_12
146_13
123_14
102_15
e3_16
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