Prime Numbers
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Numbers
Compare 23 vs 157
Compare 23 vs 157
Compare
vs
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Property
23
157
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
23
1
157
1
Prime factorization
23
157
Divisors count
2
2
Divisors
1
,
23
1
,
157
Number of properties
30
11
Additive primes
6th
21st
Chen primes
9th
30th
Class 1+ primes
7th
Cousin primes
(2nd member)
4th
Emirps
12th
Factorial primes
5th
Happy primes
4th
Harmonic primes
4th
13th
Isolated primes
2nd
14th
Kynea primes
3rd
Left-truncatable primes
7th
Long primes
4th
Pierpont primes of the 2nd kind
7th
Primes
9th
37th
Prime quintuplet 2s
(5th member)
2nd
Prime sextuplets
(6th member)
1st
Prime triplets
(3rd member)
5th
Pythagorean primes
17th
Right-truncatable primes
5th
Safe primes
4th
Sexy primes
(1st member)
6th
22nd
Sexy primes
(2nd member)
5th
21st
Sexy prime quadrupletss
(3rd member)
2nd
Sexy prime quadrupletss
(4th member)
1st
Sexy prime triplets
(2nd member)
4th
12th
Sexy prime triplets
(3rd member)
3rd
Solinas primes
8th
Sophie germain primes
5th
Super primes
12th
Thabit primes
4th
Two-sided primes
5th
Wedderburn-etherington primes
4th
Woodall primes
2nd
Roman numberals
XXIII
CLVII
Base 2
10111
2
10011101
2
Base 3
212
3
12211
3
Base 4
113
4
2131
4
Base 5
43
5
1112
5
Base 6
35
6
421
6
Base 7
32
7
313
7
Base 8
27
8
235
8
Base 9
25
9
184
9
Base 10
23
10
157
10
Base 11
21
11
133
11
Base 12
1b
12
111
12
Base 13
1a
13
c1
13
Base 14
19
14
b3
14
Base 15
18
15
a7
15
Base 16
17
16
9d
16
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