31323133313 has 2 divisors, whose sum is σ = 31323133314. Its totient is φ = 31323133312.

The previous prime is 31323133307. The next prime is 31323133399. The reversal of 31323133313 is 31333132313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27571938304 + 3751195009 = 166048^2 + 61247^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323133313 - 2⁶ = 31323133249 is a prime.

It is a super-2 number, since 2×31323133313² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31328133313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661566656 + 15661566657.

It is an arithmetic number, because the mean of its divisors is an integer number (15661566657).

Almost surely, 2^31323133313 is an apocalyptic number.

It is an amenable number.

31323133313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323133313 is an equidigital number, since it uses as much as digits as its factorization.

31323133313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 26.

Adding to 31323133313 its reverse (31333132313), we get a palindrome (62656265626).

The spelling of 31323133313 in words is "thirty-one billion, three hundred twenty-three million, one hundred thirty-three thousand, three hundred thirteen".