31502130689 has 2 divisors, whose sum is σ = 31502130690. Its totient is φ = 31502130688.

The previous prime is 31502130683. The next prime is 31502130697. The reversal of 31502130689 is 98603120513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31258240000 + 243890689 = 176800^2 + 15617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31502130689 is a prime.

It is a super-2 number, since 2×31502130689² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31502130683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15751065344 + 15751065345.

It is an arithmetic number, because the mean of its divisors is an integer number (15751065345).

Almost surely, 2^31502130689 is an apocalyptic number.

It is an amenable number.

31502130689 is a deficient number, since it is larger than the sum of its proper divisors (1).

31502130689 is an equidigital number, since it uses as much as digits as its factorization.

31502130689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 31502130689 in words is "thirty-one billion, five hundred two million, one hundred thirty thousand, six hundred eighty-nine".