32131816721369 has 2 divisors, whose sum is σ = 32131816721370. Its totient is φ = 32131816721368.

The previous prime is 32131816721357. The next prime is 32131816721393. The reversal of 32131816721369 is 96312761813123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31466265870400 + 665550850969 = 5609480^2 + 815813^2 .

It is a cyclic number.

It is not a de Polignac number, because 32131816721369 - 2⁴ = 32131816721353 is a prime.

It is a super-2 number, since 2×32131816721369² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 32131816721369.

It is not a weakly prime, because it can be changed into another prime (32131816721969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16065908360684 + 16065908360685.

It is an arithmetic number, because the mean of its divisors is an integer number (16065908360685).

Almost surely, 2^{32131816721369} is an apocalyptic number.

It is an amenable number.

32131816721369 is a deficient number, since it is larger than the sum of its proper divisors (1).

32131816721369 is an equidigital number, since it uses as much as digits as its factorization.

32131816721369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The spelling of 32131816721369 in words is "thirty-two trillion, one hundred thirty-one billion, eight hundred sixteen million, seven hundred twenty-one thousand, three hundred sixty-nine".