31310032313 has 4 divisors (see below), whose sum is σ = 35782894080. Its totient is φ = 26837170548.

The previous prime is 31310032307. The next prime is 31310032337. The reversal of 31310032313 is 31323001313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31310032313 - 2⁴ = 31310032297 is a prime.

It is a super-2 number, since 2×31310032313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31310032343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236430873 + ... + 2236430886.

It is an arithmetic number, because the mean of its divisors is an integer number (8945723520).

Almost surely, 2^31310032313 is an apocalyptic number.

It is an amenable number.

31310032313 is a deficient number, since it is larger than the sum of its proper divisors (4472861767).

31310032313 is an equidigital number, since it uses as much as digits as its factorization.

31310032313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4472861766.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31310032313 its reverse (31323001313), we get a palindrome (62633033626).

The spelling of 31310032313 in words is "thirty-one billion, three hundred ten million, thirty-two thousand, three hundred thirteen".