243423506 has 16 divisors (see below), whose sum is σ = 378095040. Its totient is φ = 117400080.

The previous prime is 243423503. The next prime is 243423547. The reversal of 243423506 is 605324342.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (243423503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115595 + ... + 117681.

It is an arithmetic number, because the mean of its divisors is an integer number (23630940).

Almost surely, 2^243423506 is an apocalyptic number.

243423506 is a deficient number, since it is larger than the sum of its proper divisors (134671534).

243423506 is a wasteful number, since it uses less digits than its factorization.

243423506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 243423506 is about 15602.0353159452. The cubic root of 243423506 is about 624.3874583178.

Adding to 243423506 its reverse (605324342), we get a palindrome (848747848).

The spelling of 243423506 in words is "two hundred forty-three million, four hundred twenty-three thousand, five hundred six".