131243002313 has 4 divisors (see below), whose sum is σ = 131245992900. Its totient is φ = 131240011728.

The previous prime is 131243002307. The next prime is 131243002321. The reversal of 131243002313 is 313200342131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313200342131 = 149 ⋅2102015719.

It can be written as a sum of positive squares in 2 ways, for example, as 7189004944 + 124053997369 = 84788^2 + 352213^2 .

It is a cyclic number.

It is not a de Polignac number, because 131243002313 - 2⁸ = 131243002057 is a prime.

It is a super-2 number, since 2×131243002313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131243001313) 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, 1428470 + ... + 1517567.

It is an arithmetic number, because the mean of its divisors is an integer number (32811498225).

Almost surely, 2^131243002313 is an apocalyptic number.

It is an amenable number.

131243002313 is a deficient number, since it is larger than the sum of its proper divisors (2990587).

131243002313 is an equidigital number, since it uses as much as digits as its factorization.

131243002313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990586.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 131243002313 its reverse (313200342131), we get a palindrome (444443344444).

The spelling of 131243002313 in words is "one hundred thirty-one billion, two hundred forty-three million, two thousand, three hundred thirteen".