131065243513 has 4 divisors (see below), whose sum is σ = 131118244468. Its totient is φ = 131012242560.

The previous prime is 131065243483. The next prime is 131065243577. The reversal of 131065243513 is 315342560131.

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 122026558329 + 9038685184 = 349323^2 + 95072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131065243513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131065247513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26496768 + ... + 26501713.

It is an arithmetic number, because the mean of its divisors is an integer number (32779561117).

Almost surely, 2^131065243513 is an apocalyptic number.

It is an amenable number.

131065243513 is a deficient number, since it is larger than the sum of its proper divisors (53000955).

131065243513 is an equidigital number, since it uses as much as digits as its factorization.

131065243513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53000954.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 131065243513 in words is "one hundred thirty-one billion, sixty-five million, two hundred forty-three thousand, five hundred thirteen".