131203423 has 4 divisors (see below), whose sum is σ = 141296008. Its totient is φ = 121110840.

The previous prime is 131203381. The next prime is 131203451. The reversal of 131203423 is 324302131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324302131 = 2789 ⋅116279.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131203423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131203423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131203463) 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, 5046273 + ... + 5046298.

It is an arithmetic number, because the mean of its divisors is an integer number (35324002).

Almost surely, 2^131203423 is an apocalyptic number.

131203423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131203423 is a deficient number, since it is larger than the sum of its proper divisors (10092585).

131203423 is a wasteful number, since it uses less digits than its factorization.

131203423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10092584.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 131203423 is about 11454.4062700779. The cubic root of 131203423 is about 508.1380561291.

Adding to 131203423 its reverse (324302131), we get a palindrome (455505554).

The spelling of 131203423 in words is "one hundred thirty-one million, two hundred three thousand, four hundred twenty-three".