13312031 has 2 divisors, whose sum is σ = 13312032.
Its totient is φ = 13312030.
The previous prime is 13312021. The next prime is 13312043. The reversal of 13312031 is 13021331.
It is a weak prime.
It is an emirp because it is prime and its reverse (13021331) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 13312031 - 210 = 13311007 is a prime.
It is a super-2 number, since 2×133120312 = 354420338689922, which contains 22 as substring.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 13311997 and 13312015.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (13312001) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656015 + 6656016.
It is an arithmetic number, because the mean of its divisors is an integer number (6656016).
Almost surely, 213312031 is an apocalyptic number.
13312031 is a deficient number, since it is larger than the sum of its proper divisors (1).
13312031 is an equidigital number, since it uses as much as digits as its factorization.
13312031 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 54, while the sum is 14.
The square root of 13312031 is about 3648.5656085645.
The cubic root of 13312031 is about 236.9998694416.
Note that the first 3 decimals are identical.
Adding to 13312031 its reverse (13021331), we get a palindrome (26333362).
The spelling of 13312031 in words is "thirteen million, three hundred twelve thousand, thirty-one".