31333213212013 has 2 divisors, whose sum is σ = 31333213212014. Its totient is φ = 31333213212012.

The previous prime is 31333213211987. The next prime is 31333213212047. The reversal of 31333213212013 is 31021231233313.

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., 31233936545289 + 99276666724 = 5588733^2 + 315082^2 .

It is a cyclic number.

It is not a de Polignac number, because 31333213212013 - 2²⁵ = 31333179657581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31333213212053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15666606606006 + 15666606606007.

It is an arithmetic number, because the mean of its divisors is an integer number (15666606606007).

Almost surely, 2^{31333213212013} is an apocalyptic number.

It is an amenable number.

31333213212013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31333213212013 is an equidigital number, since it uses as much as digits as its factorization.

31333213212013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31333213212013 its reverse (31021231233313), we get a palindrome (62354444445326).

The spelling of 31333213212013 in words is "thirty-one trillion, three hundred thirty-three billion, two hundred thirteen million, two hundred twelve thousand, thirteen".