31313321303 has 4 divisors (see below), whose sum is σ = 34159986888. Its totient is φ = 28466655720.

The previous prime is 31313321243. The next prime is 31313321323. The reversal of 31313321303 is 30312331313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31313321303 - 2²² = 31309126999 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 (31313321323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1423332776 + ... + 1423332797.

It is an arithmetic number, because the mean of its divisors is an integer number (8539996722).

Almost surely, 2^31313321303 is an apocalyptic number.

31313321303 is a deficient number, since it is larger than the sum of its proper divisors (2846665585).

31313321303 is a wasteful number, since it uses less digits than its factorization.

31313321303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846665584.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 31313321303 its reverse (30312331313), we get a palindrome (61625652616).

The spelling of 31313321303 in words is "thirty-one billion, three hundred thirteen million, three hundred twenty-one thousand, three hundred three".