31403065505113 has 2 divisors, whose sum is σ = 31403065505114. Its totient is φ = 31403065505112.

The previous prime is 31403065505111. The next prime is 31403065505117. The reversal of 31403065505113 is 31150556030413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31306576371984 + 96489133129 = 5595228^2 + 310627^2 .

It is a cyclic number.

It is not a de Polignac number, because 31403065505113 - 2¹ = 31403065505111 is a prime.

Together with 31403065505111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31403065505111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701532752556 + 15701532752557.

It is an arithmetic number, because the mean of its divisors is an integer number (15701532752557).

Almost surely, 2^{31403065505113} is an apocalyptic number.

It is an amenable number.

31403065505113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31403065505113 is an equidigital number, since it uses as much as digits as its factorization.

31403065505113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 31403065505113 in words is "thirty-one trillion, four hundred three billion, sixty-five million, five hundred five thousand, one hundred thirteen".