1. Numbers
  2. Compare 47 vs 51

Compare 47 vs 51

Property4751
Typeprimesemiprime
Unique factors12
Total factors12
Prime factorization47131 × 171
Prime factorization473 × 17
Divisors count24
Divisors1, 471, 3, 17, 51
Number of properties211
Additive primes10th 
Carol primes2nd 
Chen primes14th 
Class 1+ primes9th 
Cousin primes (2nd member)6th 
Isolated primes4th 
Left-truncatable primes10th 
Long primes6th 
Lucas primes6th 
Pierpont primes of the 2nd kind9th 
Primes15th 
Prime triplets (3rd member)7th 
Safe primes5th 
Semiprimes 18th
Sexy primes (1st member)10th 
Sexy primes (2nd member)9th 
Sexy prime quadrupletss (2nd member)3rd 
Sexy prime triplets (1st member)7th 
Sexy prime triplets (2nd member)6th 
Solinas primes13th 
Thabit primes5th 
Ulam primes5th 
Roman numberalsXLVIILI
Base 210111121100112
Base 31202312203
Base 423343034
Base 514252015
Base 611561236
Base 76571027
Base 8578638
Base 9529569
Base 1047105110
Base 1143114711
Base 123b124312
Base 1338133c13
Base 1435143914
Base 1532153615
Base 162f163316
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