31455030011939 has 2 divisors, whose sum is σ = 31455030011940. Its totient is φ = 31455030011938.

The previous prime is 31455030011917. The next prime is 31455030012001. The reversal of 31455030011939 is 93911003055413.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31455030011939 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31455030011939.

It is not a weakly prime, because it can be changed into another prime (31455030011039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15727515005969 + 15727515005970.

It is an arithmetic number, because the mean of its divisors is an integer number (15727515005970).

Almost surely, 2^{31455030011939} is an apocalyptic number.

31455030011939 is a deficient number, since it is larger than the sum of its proper divisors (1).

31455030011939 is an equidigital number, since it uses as much as digits as its factorization.

31455030011939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 218700, while the sum is 44.

The spelling of 31455030011939 in words is "thirty-one trillion, four hundred fifty-five billion, thirty million, eleven thousand, nine hundred thirty-nine".