31541245189 has 2 divisors, whose sum is σ = 31541245190. Its totient is φ = 31541245188.

The previous prime is 31541245139. The next prime is 31541245199. The reversal of 31541245189 is 98154214513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28704830625 + 2836414564 = 169425^2 + 53258^2 .

It is a cyclic number.

It is not a de Polignac number, because 31541245189 - 2¹⁹ = 31540720901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31541245139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15770622594 + 15770622595.

It is an arithmetic number, because the mean of its divisors is an integer number (15770622595).

Almost surely, 2^31541245189 is an apocalyptic number.

It is an amenable number.

31541245189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31541245189 is an equidigital number, since it uses as much as digits as its factorization.

31541245189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The spelling of 31541245189 in words is "thirty-one billion, five hundred forty-one million, two hundred forty-five thousand, one hundred eighty-nine".