31312331311 has 4 divisors (see below), whose sum is σ = 31312783872. Its totient is φ = 31311878752.

The previous prime is 31312331279. The next prime is 31312331317. The reversal of 31312331311 is 11313321313.

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 31312331311 - 2⁵ = 31312331279 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 (31312331317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98410 + ... + 268903.

It is an arithmetic number, because the mean of its divisors is an integer number (7828195968).

Almost surely, 2^31312331311 is an apocalyptic number.

31312331311 is a deficient number, since it is larger than the sum of its proper divisors (452561).

31312331311 is an equidigital number, since it uses as much as digits as its factorization.

31312331311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452560.

The product of its digits is 486, while the sum is 22.

Adding to 31312331311 its reverse (11313321313), we get a palindrome (42625652624).

The spelling of 31312331311 in words is "thirty-one billion, three hundred twelve million, three hundred thirty-one thousand, three hundred eleven".