131340320403 has 4 divisors (see below), whose sum is σ = 175120427208. Its totient is φ = 87560213600.

The previous prime is 131340320359. The next prime is 131340320407. The reversal of 131340320403 is 304023043131.

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

It is a cyclic number.

It is not a de Polignac number, because 131340320403 - 2²⁶ = 131273211539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131340320407) 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, 21890053398 + ... + 21890053403.

It is an arithmetic number, because the mean of its divisors is an integer number (43780106802).

Almost surely, 2^131340320403 is an apocalyptic number.

131340320403 is a deficient number, since it is larger than the sum of its proper divisors (43780106805).

131340320403 is an equidigital number, since it uses as much as digits as its factorization.

131340320403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43780106804.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 131340320403 its reverse (304023043131), we get a palindrome (435363363534).

The spelling of 131340320403 in words is "one hundred thirty-one billion, three hundred forty million, three hundred twenty thousand, four hundred three".