31115651113 has 4 divisors (see below), whose sum is σ = 31122153220. Its totient is φ = 31109149008.

The previous prime is 31115651107. The next prime is 31115651141.

31115651113 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4246868224 + 26868782889 = 65168^2 + 163917^2 .

It is a cyclic number.

It is not a de Polignac number, because 31115651113 - 2⁵ = 31115651081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31115651143) 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, 3243870 + ... + 3253447.

It is an arithmetic number, because the mean of its divisors is an integer number (7780538305).

Almost surely, 2^31115651113 is an apocalyptic number.

It is an amenable number.

31115651113 is a deficient number, since it is larger than the sum of its proper divisors (6502107).

31115651113 is an equidigital number, since it uses as much as digits as its factorization.

31115651113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502106.

The product of its digits is 1350, while the sum is 28.

The spelling of 31115651113 in words is "thirty-one billion, one hundred fifteen million, six hundred fifty-one thousand, one hundred thirteen".