243303426 has 20 divisors (see below), whose sum is σ = 545180262. Its totient is φ = 81101088.

The previous prime is 243303421. The next prime is 243303449. The reversal of 243303426 is 624303342.

It is a happy number.

243303426 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 235469025 + 7834401 = 15345^2 + 2799^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 243303426.

It is not an unprimeable number, because it can be changed into a prime (243303421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 750775 + ... + 751098.

Almost surely, 2^243303426 is an apocalyptic number.

243303426 is an abundant number, since it is smaller than the sum of its proper divisors (301876836).

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

243303426 is a wasteful number, since it uses less digits than its factorization.

243303426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501887 (or 1501878 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 243303426 is about 15598.1866253741. The cubic root of 243303426 is about 624.2847720172.

Adding to 243303426 its reverse (624303342), we get a palindrome (867606768).

The spelling of 243303426 in words is "two hundred forty-three million, three hundred three thousand, four hundred twenty-six".