31818044113 has 2 divisors, whose sum is σ = 31818044114. Its totient is φ = 31818044112.

The previous prime is 31818044099. The next prime is 31818044149. The reversal of 31818044113 is 31144081813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24810345169 + 7007698944 = 157513^2 + 83712^2 .

It is a cyclic number.

It is not a de Polignac number, because 31818044113 - 2⁹ = 31818043601 is a prime.

It is not a weakly prime, because it can be changed into another prime (31818044813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15909022056 + 15909022057.

It is an arithmetic number, because the mean of its divisors is an integer number (15909022057).

Almost surely, 2^31818044113 is an apocalyptic number.

It is an amenable number.

31818044113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31818044113 is an equidigital number, since it uses as much as digits as its factorization.

31818044113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 31818044113 in words is "thirty-one billion, eight hundred eighteen million, forty-four thousand, one hundred thirteen".