About the Number 205 (two hundred five)

This nBAB about the number 205 was BAB# 205 for the Spring 2015 Semester. This nBab was created on 1 May 2015.

MathBabbler Number Analyst (MBNA) output:
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205 is a natural, whole, integer
205 is odd
205 proper divisors are: 1,5,41,
205 has 3 proper divisors
205 is deficient (sum of divisors is 47; ratio: 0.229268)
205 is unhappy
205 is a Squarefree Number
205 is composite (not prime)
205 has the prime factors: 5*41 (sum=46)
205 is semiprime (biprime or 2-almost prime)
205 is a lucky number
205 is Arithmetic (A003601)
205 is not in A038853
205 in octal is 0315
205 in hexadecimal is 0xcd
205 in binary is 11001101 (is odious)
205 nearest square numbers: -9...20 (196...225 [15])
sqrt(205) = 14.3178
ln(205) = 5.32301
log(205) = 2.31175
205 reciprocal is .00487804878048780487804878048780
205! is 2.71842e+386
205 is 65.2535 Pi years
205 is 10 score and 5 years
205 written as a Roman numeral is CCV
205 is 103^2 - 102^2 and 103 + 102 = 205
205 is a multiple of 5 & it contains a 5 (A121025)

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 01 May 2015

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This work is licensed under a Creative Commons Attribution 3.0 United States License.