About the Number 161 (one hundred sixty-one)

This nBAB about the number 161 was BAB# 161 for the fall 2009 semester.

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   161 is a natural, whole, integer
   161 is odd
   161 proper divisors are: 1,7,23,
   161 is deficient (sum of divisors is 31)
   161 is unhappy
   161 is not a Harshad number
   161 is not prime
   161 has the prime factors: 7*23 (sum=30)
   161 is semiprime (biprime or 2-almost prime)
   161 sum of prime factors is: 30
   161 is undulating
   161 is palindromic
   161 is the sum of 5 consecutive primes
       23 + 29 + 31 + 37 + 41
   161 in octal is 0241
   161 in hexadecimal is 0xa1
   161 in binary is 10100001 (is odious)
   161 nearest square numbers: -17...8 (144...169 [13])
   sqrt(161) = 12.6886
   ln(161) = 5.0814
   log(161) = 2.20683
   161 reciprocal is .00621118012422360248447204968944
   161! is 7.59071e+286
   161 is 51.2479 Pi years
   161 is 8 score and 1 year
   161 written as a Roman numeral is CLXI

[NumDic.com] 161 is the difference of two squares (15^2 - 8^2 and 81^2 - 80^2).


Creator: Gerald Thurman [gthurman@gmail.com]
Created: 07 December 2009

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