31310003313 has 6 divisors (see below), whose sum is σ = 45225560354. Its totient is φ = 20873335536.

The previous prime is 31310003311. The next prime is 31310003327. The reversal of 31310003313 is 31330001313.

It can be written as a sum of positive squares in only one way, i.e., 29416709169 + 1893294144 = 171513^2 + 43512^2 .

It is not a de Polignac number, because 31310003313 - 2¹ = 31310003311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31310003311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1739444620 + ... + 1739444637.

Almost surely, 2^31310003313 is an apocalyptic number.

It is an amenable number.

31310003313 is a deficient number, since it is larger than the sum of its proper divisors (13915557041).

31310003313 is a wasteful number, since it uses less digits than its factorization.

31310003313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478889263 (or 3478889260 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 18.

Adding to 31310003313 its reverse (31330001313), we get a palindrome (62640004626).

It can be divided in two parts, 3131000 and 3313, that added together give a palindrome (3134313).

The spelling of 31310003313 in words is "thirty-one billion, three hundred ten million, three thousand, three hundred thirteen".