31613822189 has 2 divisors, whose sum is σ = 31613822190. Its totient is φ = 31613822188.

The previous prime is 31613822173. The next prime is 31613822243. The reversal of 31613822189 is 98122831613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31586175625 + 27646564 = 177725^2 + 5258^2 .

It is a cyclic number.

It is not a de Polignac number, because 31613822189 - 2⁴ = 31613822173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31613822389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15806911094 + 15806911095.

It is an arithmetic number, because the mean of its divisors is an integer number (15806911095).

Almost surely, 2^31613822189 is an apocalyptic number.

It is an amenable number.

31613822189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31613822189 is an equidigital number, since it uses as much as digits as its factorization.

31613822189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The spelling of 31613822189 in words is "thirty-one billion, six hundred thirteen million, eight hundred twenty-two thousand, one hundred eighty-nine".