31130131289 has 2 divisors, whose sum is σ = 31130131290. Its totient is φ = 31130131288.

The previous prime is 31130131283. The next prime is 31130131327. The reversal of 31130131289 is 98213103113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29813892889 + 1316238400 = 172667^2 + 36280^2 .

It is a cyclic number.

It is not a de Polignac number, because 31130131289 - 2²⁰ = 31129082713 is a prime.

It is not a weakly prime, because it can be changed into another prime (31130131283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565065644 + 15565065645.

It is an arithmetic number, because the mean of its divisors is an integer number (15565065645).

Almost surely, 2^31130131289 is an apocalyptic number.

It is an amenable number.

31130131289 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130131289 is an equidigital number, since it uses as much as digits as its factorization.

31130131289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 31130131289 in words is "thirty-one billion, one hundred thirty million, one hundred thirty-one thousand, two hundred eighty-nine".