31131326266611 has 16 divisors (see below), whose sum is σ = 43110284405760. Its totient is φ = 19961507432160.

The previous prime is 31131326266589. The next prime is 31131326266639. The reversal of 31131326266611 is 11666262313113.

It is a de Polignac number, because none of the positive numbers 2^k-31131326266611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31131326666611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1026811356 + ... + 1026841673.

It is an arithmetic number, because the mean of its divisors is an integer number (2694392775360).

Almost surely, 2^{31131326266611} is an apocalyptic number.

31131326266611 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31131326266611 is a deficient number, since it is larger than the sum of its proper divisors (11978958139149).

31131326266611 is a wasteful number, since it uses less digits than its factorization.

31131326266611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053653226.

The product of its digits is 139968, while the sum is 42.

Adding to 31131326266611 its reverse (11666262313113), we get a palindrome (42797588579724).

The spelling of 31131326266611 in words is "thirty-one trillion, one hundred thirty-one billion, three hundred twenty-six million, two hundred sixty-six thousand, six hundred eleven".