131423205023 has 4 divisors (see below), whose sum is σ = 143370769128. Its totient is φ = 119475640920.

The previous prime is 131423205019. The next prime is 131423205059. The reversal of 131423205023 is 320502324131.

It is a happy number.

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 131423205023 - 2² = 131423205019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131423204983 and 131423205001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131423205013) 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, 5973782036 + ... + 5973782057.

It is an arithmetic number, because the mean of its divisors is an integer number (35842692282).

Almost surely, 2^131423205023 is an apocalyptic number.

131423205023 is a deficient number, since it is larger than the sum of its proper divisors (11947564105).

131423205023 is a wasteful number, since it uses less digits than its factorization.

131423205023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11947564104.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 131423205023 its reverse (320502324131), we get a palindrome (451925529154).

The spelling of 131423205023 in words is "one hundred thirty-one billion, four hundred twenty-three million, two hundred five thousand, twenty-three".