About the Number 213 (two hundred thirteen)

This nBAB for the number 213 was created because 213 is in the integer interal [200-225]. On 2 May 2015, nBABs for the numbers 200 to 225 was completed.

MathBabbler Number Analyst (MBNA) output:
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213 is a natural, whole, integer
213 is odd
213 proper divisors are: 1,3,71,
213 has 3 proper divisors
213 is deficient (sum of divisors is 75; ratio: 0.352113)
213 is unhappy
213 is a Squarefree Number
213 is composite (not prime)
213 has the prime factors: 3*71 (sum=74)
213 is semiprime (biprime or 2-almost prime)
213 is Arithmetic (A003601)
213 in octal is 0325
213 in hexadecimal is 0xd5
213 in binary is 11010101 (is odious)
213 nearest square numbers: -17...12 (196...225 [15])
sqrt(213) = 14.5945
ln(213) = 5.36129
log(213) = 2.32838
213 reciprocal is .00469483568075117370892018779342
213! is 1.00828e+405
213 is 67.8 Pi years
213 is 10 score and 13 years
213 written as a Roman numeral is CCXIII
213 is 107^2 - 106^2 and 107 + 106 = 213
213 is a multiple of 1 & it contains a 1 (A011531)
213 is a multiple of 3 & it contains a 3 (A121023)

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 02 May 2015

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