31401310139 has 2 divisors, whose sum is σ = 31401310140. Its totient is φ = 31401310138.

The previous prime is 31401310069. The next prime is 31401310169. The reversal of 31401310139 is 93101310413.

It is a strong prime.

It is an emirp because it is prime and its reverse (93101310413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31401310139 - 2¹² = 31401306043 is a prime.

It is not a weakly prime, because it can be changed into another prime (31401310169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700655069 + 15700655070.

It is an arithmetic number, because the mean of its divisors is an integer number (15700655070).

Almost surely, 2^31401310139 is an apocalyptic number.

31401310139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401310139 is an equidigital number, since it uses as much as digits as its factorization.

31401310139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 31401310139 in words is "thirty-one billion, four hundred one million, three hundred ten thousand, one hundred thirty-nine".