31313231313 has 96 divisors (see below), whose sum is σ = 55572975360. Its totient is φ = 15515297280.

The previous prime is 31313231303. The next prime is 31313231351.

31313231313 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31313231313 - 2¹² = 31313227217 is a prime.

It is a super-2 number, since 2×31313231313² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31313231303) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2042868 + ... + 2058138.

It is an arithmetic number, because the mean of its divisors is an integer number (578885160).

Almost surely, 2^31313231313 is an apocalyptic number.

It is an amenable number.

31313231313 is a deficient number, since it is larger than the sum of its proper divisors (24259744047).

31313231313 is a wasteful number, since it uses less digits than its factorization.

31313231313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15367 (or 15360 counting only the distinct ones).

The product of its digits is 1458, while the sum is 24.

The spelling of 31313231313 in words is "thirty-one billion, three hundred thirteen million, two hundred thirty-one thousand, three hundred thirteen".