131232423 has 16 divisors (see below), whose sum is σ = 200192000. Its totient is φ = 74907936.

The previous prime is 131232389. The next prime is 131232427. The reversal of 131232423 is 324232131.

It is a de Polignac number, because none of the positive numbers 2^k-131232423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 131232423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131232427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19953 + ... + 25701.

It is an arithmetic number, because the mean of its divisors is an integer number (12512000).

Almost surely, 2^131232423 is an apocalyptic number.

131232423 is a deficient number, since it is larger than the sum of its proper divisors (68959577).

131232423 is a wasteful number, since it uses less digits than its factorization.

131232423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846.

The product of its digits is 864, while the sum is 21.

The square root of 131232423 is about 11455.6720885333. The cubic root of 131232423 is about 508.1754914280.

Adding to 131232423 its reverse (324232131), we get a palindrome (455464554).

The spelling of 131232423 in words is "one hundred thirty-one million, two hundred thirty-two thousand, four hundred twenty-three".