131240423 has 4 divisors (see below), whose sum is σ = 131592648. Its totient is φ = 130888200.

The previous prime is 131240413. The next prime is 131240441. The reversal of 131240423 is 324042131.

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 131240423 - 2⁴ = 131240407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131240395 and 131240404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131240413) 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, 175553 + ... + 176298.

It is an arithmetic number, because the mean of its divisors is an integer number (32898162).

Almost surely, 2^131240423 is an apocalyptic number.

131240423 is a deficient number, since it is larger than the sum of its proper divisors (352225).

131240423 is an equidigital number, since it uses as much as digits as its factorization.

131240423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352224.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 131240423 is about 11456.0212552177. The cubic root of 131240423 is about 508.1858174364.

Adding to 131240423 its reverse (324042131), we get a palindrome (455282554).

The spelling of 131240423 in words is "one hundred thirty-one million, two hundred forty thousand, four hundred twenty-three".