131204431423 has 4 divisors (see below), whose sum is σ = 141297080008. Its totient is φ = 121111782840.

The previous prime is 131204431399. The next prime is 131204431481. The reversal of 131204431423 is 324134402131.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131204431423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131204431391 and 131204431400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131204431493) 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, 5046324273 + ... + 5046324298.

It is an arithmetic number, because the mean of its divisors is an integer number (35324270002).

Almost surely, 2^131204431423 is an apocalyptic number.

131204431423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131204431423 is a deficient number, since it is larger than the sum of its proper divisors (10092648585).

131204431423 is a wasteful number, since it uses less digits than its factorization.

131204431423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10092648584.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 131204431423 its reverse (324134402131), we get a palindrome (455338833554).

The spelling of 131204431423 in words is "one hundred thirty-one billion, two hundred four million, four hundred thirty-one thousand, four hundred twenty-three".