31113331189 has 2 divisors, whose sum is σ = 31113331190. Its totient is φ = 31113331188.

The previous prime is 31113331169. The next prime is 31113331219. The reversal of 31113331189 is 98113331113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25789148100 + 5324183089 = 160590^2 + 72967^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113331189 - 2²³ = 31104942581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31113331169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556665594 + 15556665595.

It is an arithmetic number, because the mean of its divisors is an integer number (15556665595).

Almost surely, 2^31113331189 is an apocalyptic number.

It is an amenable number.

31113331189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113331189 is an equidigital number, since it uses as much as digits as its factorization.

31113331189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The spelling of 31113331189 in words is "thirty-one billion, one hundred thirteen million, three hundred thirty-one thousand, one hundred eighty-nine".