131445061213 has 4 divisors (see below), whose sum is σ = 131579601660. Its totient is φ = 131310520768.

The previous prime is 131445061207. The next prime is 131445061219. The reversal of 131445061213 is 312160544131.

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

It is an interprime number because it is at equal distance from previous prime (131445061207) and next prime (131445061219).

It can be written as a sum of positive squares in 2 ways, for example, as 127503983929 + 3941077284 = 357077^2 + 62778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131445061213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131445061219) 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 in 3 ways as a sum of consecutive naturals, for example, 67268758 + ... + 67270711.

It is an arithmetic number, because the mean of its divisors is an integer number (32894900415).

Almost surely, 2^131445061213 is an apocalyptic number.

It is an amenable number.

131445061213 is a deficient number, since it is larger than the sum of its proper divisors (134540447).

131445061213 is an equidigital number, since it uses as much as digits as its factorization.

131445061213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134540446.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 131445061213 in words is "one hundred thirty-one billion, four hundred forty-five million, sixty-one thousand, two hundred thirteen".