Prime Numbers
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Numbers
Compare 31 vs 47
Compare 31 vs 47
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vs
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Property
31
47
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
31
^{1}
47
^{1}
Prime factorization
31
47
Divisors count
2
2
Divisors
1
,
31
1
,
47
Number of properties
18
21
Additive primes
10th
Carol primes
2nd
Centered decagonal primes
2nd
Centered triangular primes
2nd
Chen primes
11th
14th
Class 1+ primes
8th
9th
Cousin primes
(2nd member)
6th
Emirps
3rd
Euclid primes
4th
Happy primes
5th
Isolated primes
4th
Left-truncatable primes
10th
Long primes
6th
Lucas primes
6th
Lucky primes
4th
Mersenne primes
3rd
Multiplicative primes
7th
Pierpont primes of the 2nd kind
8th
9th
Primes
11th
15th
Prime triplets
(3rd member)
7th
Right-truncatable primes
7th
Safe primes
5th
Sexy primes
(1st member)
7th
10th
Sexy primes
(2nd member)
9th
Sexy prime quadrupletss
(2nd member)
3rd
Sexy prime triplets
(1st member)
5th
7th
Sexy prime triplets
(2nd member)
6th
Solinas primes
10th
13th
Super primes
5th
Thabit primes
5th
Twin primes
(2nd member)
5th
Ulam primes
5th
Roman numberals
XXXI
XLVII
Base 2
11111
_{2}
101111
_{2}
Base 3
1011
_{3}
1202
_{3}
Base 4
133
_{4}
233
_{4}
Base 5
111
_{5}
142
_{5}
Base 6
51
_{6}
115
_{6}
Base 7
43
_{7}
65
_{7}
Base 8
37
_{8}
57
_{8}
Base 9
34
_{9}
52
_{9}
Base 10
31
_{10}
47
_{10}
Base 11
29
_{11}
43
_{11}
Base 12
27
_{12}
3b
_{12}
Base 13
25
_{13}
38
_{13}
Base 14
23
_{14}
35
_{14}
Base 15
21
_{15}
32
_{15}
Base 16
1f
_{16}
2f
_{16}
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