31343245313 has 2 divisors, whose sum is σ = 31343245314. Its totient is φ = 31343245312.

The previous prime is 31343245309. The next prime is 31343245333. The reversal of 31343245313 is 31354234313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30692587249 + 650658064 = 175193^2 + 25508^2 .

It is a cyclic number.

It is not a de Polignac number, because 31343245313 - 2² = 31343245309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31343245313.

It is not a weakly prime, because it can be changed into another prime (31343245333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15671622656 + 15671622657.

It is an arithmetic number, because the mean of its divisors is an integer number (15671622657).

Almost surely, 2^31343245313 is an apocalyptic number.

It is an amenable number.

31343245313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31343245313 is an equidigital number, since it uses as much as digits as its factorization.

31343245313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 32.

Adding to 31343245313 its reverse (31354234313), we get a palindrome (62697479626).

The spelling of 31343245313 in words is "thirty-one billion, three hundred forty-three million, two hundred forty-five thousand, three hundred thirteen".