253 was the smallest number that didn't have a nBAB on 7 April 2016. MathBabbler is trying to ensure that the numbers 0-300 have nBABs by the end of the Spring 2016 Semester. With the posting of this nBAB for 253, 254 became the smallest number without a nBAB on 7 April 2016.
MathBabbler Number Analyst (MBNA) output: ========================================= 253 is a natural, whole, integer 253 is odd 253 proper divisors are: 1,11,23, 253 has 3 proper divisors 253 is deficient (sum of divisors is 35; ratio: 0.13834) 253 is unhappy 253 is a Squarefree Number 253 is composite (not prime) 253 has the prime factors: 11*23 (sum=34) 253 is semiprime (biprime or 2-almost prime) 253 is a 23-smooth number 253 is centered dodecagonal 253 is triangular 253 is Arithmetic (A003601) 253 is the sum of 9 consecutive primes 253 = 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 253 in octal is 0375 253 in hexadecimal is 0xfd 253 in binary is 11111101 (is odious) 253 nearest square numbers: -28...3 (225...256 [16]) sqrt(253) = 15.906 ln(253) = 5.53339 log(253) = 2.40312 253 reciprocal is .00395256916996047430830039525691 253! is 5.17346e+499 253 is 80.5324 Pi years 253 is 12 score and 13 years 253 written as a Roman numeral is CCLIII 253 is 127^2 - 126^2 and 127 + 126 = 253
Creator: Gerald Thurman
[gthurman@gmail.com]
Created: 07 April 2016