243431423 has 4 divisors (see below), whose sum is σ = 251825640. Its totient is φ = 235037208.

The previous prime is 243431413. The next prime is 243431429. The reversal of 243431423 is 324134342.

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 243431423 - 2⁴ = 243431407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243431392 and 243431401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243431429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4197065 + ... + 4197122.

It is an arithmetic number, because the mean of its divisors is an integer number (62956410).

Almost surely, 2^243431423 is an apocalyptic number.

243431423 is a deficient number, since it is larger than the sum of its proper divisors (8394217).

243431423 is an equidigital number, since it uses as much as digits as its factorization.

243431423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8394216.

The product of its digits is 6912, while the sum is 26.

The square root of 243431423 is about 15602.2890307801. The cubic root of 243431423 is about 624.3942273462.

Adding to 243431423 its reverse (324134342), we get a palindrome (567565765).

The spelling of 243431423 in words is "two hundred forty-three million, four hundred thirty-one thousand, four hundred twenty-three".