1. Numbers
  2. Compare 251 vs 261

Compare 251 vs 261

Property251261
Typeprimecomposite number
Unique factors12
Total factors13
Prime factorization251132 × 291
Prime factorization2513 × 3 × 29
Divisors count26
Divisors1, 2511, 3, 9, 29, 87, 261
Number of properties100
Chen primes41st 
Good primes19th 
Harmonic primes20th 
Isolated primes21st 
Primes54th 
Sexy primes (1st member)30th 
Sexy prime quadrupletss (1st member)5th 
Sexy prime triplets (1st member)15th 
Solinas primes30th 
Sophie germain primes18th 
Roman numberalsCCLICCLXI
Base 21111101121000001012
Base 310002231002003
Base 433234100114
Base 52001520215
Base 61055611136
Base 750675227
Base 837384058
Base 930893209
Base 102511026110
Base 112091121811
Base 1218b1219912
Base 131641317113
Base 1413d1414914
Base 1511b1512615
Base 16fb1610516
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