131534215213013 has 4 divisors (see below), whose sum is σ = 132002308505868. Its totient is φ = 131066121920160.

The previous prime is 131534215212991. The next prime is 131534215213019. The reversal of 131534215213013 is 310312512435131.

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 73431068671249 + 58103146541764 = 8569193^2 + 7622542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131534215213013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131534215213019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234046646006 + ... + 234046646567.

It is an arithmetic number, because the mean of its divisors is an integer number (33000577126467).

Almost surely, 2^{131534215213013} is an apocalyptic number.

It is an amenable number.

131534215213013 is a deficient number, since it is larger than the sum of its proper divisors (468093292855).

131534215213013 is an equidigital number, since it uses as much as digits as its factorization.

131534215213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468093292854.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 131534215213013 its reverse (310312512435131), we get a palindrome (441846727648144).

The spelling of 131534215213013 in words is "one hundred thirty-one trillion, five hundred thirty-four billion, two hundred fifteen million, two hundred thirteen thousand, thirteen".