Prime Numbers
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Numbers
Compare 31 vs 73
Compare 31 vs 73
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Property
31
73
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
31
1
73
1
Prime factorization
31
73
Divisors count
2
2
Divisors
1
,
31
1
,
73
Number of properties
18
17
Centered decagonal primes
2nd
Centered triangular primes
2nd
Chen primes
11th
Class 1+ primes
8th
Emirps
3rd
6th
Euclid primes
4th
Happy primes
5th
Harmonic primes
7th
Left-truncatable primes
13th
Lucky primes
4th
8th
Mersenne primes
3rd
Multiplicative primes
7th
Pierpont primes
9th
Pierpont primes of the 2nd kind
8th
Primes
11th
21st
Prime triplets
(3rd member)
8th
Pythagorean primes
9th
Right-truncatable primes
7th
12th
Sexy primes
(1st member)
7th
14th
Sexy primes
(2nd member)
13th
Sexy prime quadrupletss
(3rd member)
4th
Sexy prime triplets
(1st member)
5th
Sexy prime triplets
(2nd member)
9th
Sexy prime triplets
(3rd member)
8th
Solinas primes
10th
18th
Super primes
5th
Twin primes
(2nd member)
5th
8th
Two-sided primes
8th
Roman numberals
XXXI
LXXIII
Base 2
11111
2
1001001
2
Base 3
1011
3
2201
3
Base 4
133
4
1021
4
Base 5
111
5
243
5
Base 6
51
6
201
6
Base 7
43
7
133
7
Base 8
37
8
111
8
Base 9
34
9
81
9
Base 10
31
10
73
10
Base 11
29
11
67
11
Base 12
27
12
61
12
Base 13
25
13
58
13
Base 14
23
14
53
14
Base 15
21
15
4d
15
Base 16
1f
16
49
16
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