243123424 has 48 divisors (see below), whose sum is σ = 490976640. Its totient is φ = 118468480.

The previous prime is 243123407. The next prime is 243123427. The reversal of 243123424 is 424321342.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243123427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246837 + ... + 247819.

It is an arithmetic number, because the mean of its divisors is an integer number (10228680).

Almost surely, 2^243123424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243123424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245488320).

243123424 is an abundant number, since it is smaller than the sum of its proper divisors (247853216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243123424 is a wasteful number, since it uses less digits than its factorization.

243123424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183 (or 1175 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 243123424 is about 15592.4155922038. The cubic root of 243123424 is about 624.1307801714.

Adding to 243123424 its reverse (424321342), we get a palindrome (667444766).

The spelling of 243123424 in words is "two hundred forty-three million, one hundred twenty-three thousand, four hundred twenty-four".