This nBAB for the number

213was created because213is in the integer interal [200-225]. On 2 May 2015, nBABs for the numbers 200 to 225 was completed.MathBabbler Number Analyst (MBNA) output: ========================================= 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

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