31079891311 has 4 divisors (see below), whose sum is σ = 35519875792. Its totient is φ = 26639906832.

The previous prime is 31079891299. The next prime is 31079891333. The reversal of 31079891311 is 11319897013.

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

It is not a de Polignac number, because 31079891311 - 2⁹ = 31079890799 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 (31079891111) 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, 2219992230 + ... + 2219992243.

It is an arithmetic number, because the mean of its divisors is an integer number (8879968948).

Almost surely, 2^31079891311 is an apocalyptic number.

31079891311 is a deficient number, since it is larger than the sum of its proper divisors (4439984481).

31079891311 is an equidigital number, since it uses as much as digits as its factorization.

31079891311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4439984480.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 31079891311 in words is "thirty-one billion, seventy-nine million, eight hundred ninety-one thousand, three hundred eleven".