### About the Number 531 (five hundred thirty-one)

531 was the smallest number without a nBAB on 14 August 2018.

```MathBabbler Number Analyst (MBNA) output:
=========================================
531 is natural, counting, whole, integer
531 is odd (not even)
531 is extremely odd
531 is super extremely odd
531 proper divisors are: 1,3,9,59,177,
531 has 5 proper divisors
531 is deficient (sum of divisors is 249; ratio: 0.468927)
531 is unhappy
531 is not a Squarefree Number: 9,
531 is composite (not prime)
531 has the prime factors: 3*3*59 (sum=65)
531 is a 59-smooth number
531 is Recaman number 1199
531 is a Moran Number
531 digital root is 9
531 in octal is 01023
531 in binary is 1000010011 (is evil)
531 nearest square numbers: -2...45 (529...576 [24])
sqrt(531) = 23.0434
ln(531) = 6.27476
log(531) = 2.72509
531! is 1.5015e+1218
531 is 169.023 Pi years
531 is 26 score and 11 years
531 written as a Roman numeral is DXXXI
531 is 266^2 - 265^2 and 266 + 265 = 531
531 is a multiple of 1 & it contains a 1 (A011531)
531 is a multiple of 3 & it contains a 3 (A121023)
__________________________________________________________
531 reciprocal is 0.0018832391713747645951035781544256120527306967984934086629
remainders:
1,10,100,469,442,172,127,208,487,91,379,73,199,397,253,406,343,244,316,505,271,55,19,190,307,415,433,82,289,235,226,136,298,325,64,109,28,280,145,388,163,37,370,514,361,424,523,451,262,496,181,217,46,460,352,334,154,478,1
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 14 August 2018