31323340213 has 12 divisors (see below), whose sum is σ = 34476144768. Its totient is φ = 28223639360.

The previous prime is 31323340193. The next prime is 31323340253. The reversal of 31323340213 is 31204332313.

It is a de Polignac number, because none of the positive numbers 2^k-31323340213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323340253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28956 + ... + 251962.

It is an arithmetic number, because the mean of its divisors is an integer number (2873012064).

Almost surely, 2^31323340213 is an apocalyptic number.

It is an amenable number.

31323340213 is a deficient number, since it is larger than the sum of its proper divisors (3152804555).

31323340213 is a wasteful number, since it uses less digits than its factorization.

31323340213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223244 (or 223131 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31323340213 its reverse (31204332313), we get a palindrome (62527672526).

The spelling of 31323340213 in words is "thirty-one billion, three hundred twenty-three million, three hundred forty thousand, two hundred thirteen".