131031202013 has 4 divisors (see below), whose sum is σ = 131075517180. Its totient is φ = 130986886848.

The previous prime is 131031201997. The next prime is 131031202021. The reversal of 131031202013 is 310202130131.

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 87215083684 + 43816118329 = 295322^2 + 209323^2 .

It is a cyclic number.

It is not a de Polignac number, because 131031202013 - 2⁴ = 131031201997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131031201982 and 131031202000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031202063) 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, 22153148 + ... + 22159061.

It is an arithmetic number, because the mean of its divisors is an integer number (32768879295).

Almost surely, 2^131031202013 is an apocalyptic number.

It is an amenable number.

131031202013 is a deficient number, since it is larger than the sum of its proper divisors (44315167).

131031202013 is an equidigital number, since it uses as much as digits as its factorization.

131031202013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44315166.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 131031202013 its reverse (310202130131), we get a palindrome (441233332144).

The spelling of 131031202013 in words is "one hundred thirty-one billion, thirty-one million, two hundred two thousand, thirteen".