31231113079 has 2 divisors, whose sum is σ = 31231113080. Its totient is φ = 31231113078.

The previous prime is 31231113077. The next prime is 31231113107. The reversal of 31231113079 is 97031113213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31231113079 - 2¹ = 31231113077 is a prime.

Together with 31231113077, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31231113079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31231113077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615556539 + 15615556540.

It is an arithmetic number, because the mean of its divisors is an integer number (15615556540).

Almost surely, 2^31231113079 is an apocalyptic number.

31231113079 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231113079 is an equidigital number, since it uses as much as digits as its factorization.

31231113079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 31.

The spelling of 31231113079 in words is "thirty-one billion, two hundred thirty-one million, one hundred thirteen thousand, seventy-nine".