### About the Number 13,131 (thirteen thousand one hundred thirty-one)

13131 was the smallest palindromic Zuckerman Harshad number that didn't have a nBAB when the Zuckerman Harshad nBAB collection was created on 13 April 2014.

```MathBabbler Number Analyst (MBNA) output:
=========================================
13131 is a natural, whole, integer
13131 is odd
13131 proper divisors are: 1,3,9,1459,4377,
13131 has 5 proper divisors
13131 is deficient (sum of divisors is 5849; ratio: 0.445434)
13131 is unhappy
13131 is not a Squarefree Number: 9,
13131 is Harshad (Niven) number
13131 is composite (not prime)
13131 has the prime factors: 3*3*1459 (sum=1465)
13131 is undulating
13131 is an octahedral number
13131 is palindromic
13131 is a Zuckerman number
13131 in octal is 031513
13131 in hexadecimal is 0x334b
13131 in binary is 11001101001011 (is evil)
13131 nearest square numbers: -135...94 (12996...13225 )
sqrt(13131) = 114.591
ln(13131) = 9.48273
log(13131) = 4.1183
13131 reciprocal is .00007615566217348259843119335922
13131 is 4179.73 Pi years
13131 is 656 score and 11 years
13131 is 6566^2 - 6565^2 and 6566 + 6565 = 13131
```

Observe how the base-10 palindromic number `13131` is the base-8 palindromic number 31513.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 16 April 2014 