131936404321 has 4 divisors (see below), whose sum is σ = 135154365444. Its totient is φ = 128718443200.

The previous prime is 131936404273. The next prime is 131936404331. The reversal of 131936404321 is 123404639131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44580099600 + 87356304721 = 211140^2 + 295561^2 .

It is a cyclic number.

It is not a de Polignac number, because 131936404321 - 2¹⁹ = 131935880033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131936404331) 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 in 3 ways as a sum of consecutive naturals, for example, 1608980500 + ... + 1608980581.

It is an arithmetic number, because the mean of its divisors is an integer number (33788591361).

Almost surely, 2^131936404321 is an apocalyptic number.

It is an amenable number.

131936404321 is a deficient number, since it is larger than the sum of its proper divisors (3217961123).

131936404321 is an equidigital number, since it uses as much as digits as its factorization.

131936404321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217961122.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 131936404321 in words is "one hundred thirty-one billion, nine hundred thirty-six million, four hundred four thousand, three hundred twenty-one".