This nBAB for the number

51,215was created because on 12 May 2015 MathBabbler was reminded that 10 May 2015 through 19 May 2015 were palindromic dates.MathBabbler Number Analyst (MBNA) output: ========================================= 51215 is a natural, whole, integer 51215 is odd 51215 proper divisors are: 1,5,10243, 51215 has 3 proper divisors 51215 is deficient (sum of divisors is 10249; ratio: 0.200117) 51215 is unhappy 51215 is a Squarefree Number 51215 is composite (not prime) 51215 has the prime factors: 5*10243 (sum=10248) 51215 is semiprime (biprime or 2-almost prime) 51215 is palindromic 51215 is Arithmetic (A003601) 51215 is not in A038853 51215 in octal is 0144017 51215 in hexadecimal is 0xc80f 51215 in binary is 1100100000001111 (is odious) 51215 nearest square numbers: -139...314 (51076...51529 [227]) sqrt(51215) = 226.307 ln(51215) = 10.8438 log(51215) = 4.7094 51215 reciprocal is .00001952552962999121351166650395 51215 is an apocalyptic power 51215! is inf 51215 is 16302.2 Pi years 51215 is 2560 score and 15 years 51215 is 25608^2 - 25607^2 and 25608 + 25607 = 51215 51215 is a multiple of 1 & it contains a 1 (A011531) 51215 is a multiple of 5 & it contains a 5 (A121025)

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 12 May 2015

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