31431113204089 has 2 divisors, whose sum is σ = 31431113204090. Its totient is φ = 31431113204088.

The previous prime is 31431113204087. The next prime is 31431113204123. The reversal of 31431113204089 is 98040231113413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16879238149225 + 14551875054864 = 4108435^2 + 3814692^2 .

It is an emirp because it is prime and its reverse (98040231113413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31431113204089 - 2¹ = 31431113204087 is a prime.

Together with 31431113204087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31431113204083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715556602044 + 15715556602045.

It is an arithmetic number, because the mean of its divisors is an integer number (15715556602045).

Almost surely, 2^{31431113204089} is an apocalyptic number.

It is an amenable number.

31431113204089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31431113204089 is an equidigital number, since it uses as much as digits as its factorization.

31431113204089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 31431113204089 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred thirteen million, two hundred four thousand, eighty-nine".