31130230139 has 2 divisors, whose sum is σ = 31130230140. Its totient is φ = 31130230138.

The previous prime is 31130230111. The next prime is 31130230169. The reversal of 31130230139 is 93103203113.

It is a weak prime.

It is an emirp because it is prime and its reverse (93103203113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31130230139 is a prime.

It is not a weakly prime, because it can be changed into another prime (31130230169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565115069 + 15565115070.

It is an arithmetic number, because the mean of its divisors is an integer number (15565115070).

Almost surely, 2^31130230139 is an apocalyptic number.

31130230139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130230139 is an equidigital number, since it uses as much as digits as its factorization.

31130230139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 26.

The spelling of 31130230139 in words is "thirty-one billion, one hundred thirty million, two hundred thirty thousand, one hundred thirty-nine".