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161 (number) - Wikipedia

From Wikipedia, the free encyclopedia

Natural number

161 (one hundred [and] sixty-one) is the natural number following 160 and preceding 162.

161 is the sum of five consecutive prime numbers: 23, 29, 31, 37, and 41.
161 is a hexagonal pyramidal number.^[1]
161 is a semiprime. Since its prime factors 7 and 23 are both Gaussian primes, 161 is a Blum integer.
161 is a palindromic number.^[2]
⁠161/72⁠ is a commonly used rational approximation of the square root of 5 and is the closest fraction with denominator <300 to that number.

161 as a code for Anti-Fascist Action (A=1, F=6, by order of the alphabet), sometimes used in 161>88^[3] (88 being code for Heil Hitler among neo-nazis, as H=8)

Number Facts and Trivia: 161
The Number 161
VirtueScience: 161 Archived 2021-01-24 at the Wayback Machine

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Integers −1 0s

0
1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19

20
21
22
23
24
25
26
27
28
29

30
31
32
33
34
35
36
37
38
39

40
41
42
43
44
45
46
47
48
49

50
51
52
53
54
55
56
57
58
59

60
61
62
63
64
65
66
67
68
69

70
71
72
73
74
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76
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79

80
81
82
83
84
85
86
87
88
89

90
91
92
93
94
95
96
97
98
99

1000
- 1001
- 1023
- 1024
- 1089
- 1093
- 1105
- 1234
- 1289
- 1458
- 1510
- 1728
- 1729
- 1980
- 1987
2000
- 2016
- 2520
3000
- 3511
4000
- 4104
5000
- 5040
6000
- 6174
7000
- 7744
- 7825
8000
- 8128
- 8192
9000
- 9855
- 9999

10,000
- 16,807
20,000
30,000
40,000
50,000
60,000
- 64,079
- 65,535
- 65,536
- 65,537
70,000
80,000
90,000

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