243355304240 has 80 divisors (see below), whose sum is σ = 587600986368. Its totient is φ = 93659182848.

The previous prime is 243355304239. The next prime is 243355304243. The reversal of 243355304240 is 42403553342.

It is a happy number.

243355304240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 243355304240.

It is not an unprimeable number, because it can be changed into a prime (243355304243) 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, 297452 + ... + 758411.

Almost surely, 2^243355304240 is an apocalyptic number.

243355304240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243355304240 is an abundant number, since it is smaller than the sum of its proper divisors (344245682128).

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

243355304240 is a wasteful number, since it uses less digits than its factorization.

243355304240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055986 (or 1055980 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 243355304240 its reverse (42403553342), we get a palindrome (285758857582).

The spelling of 243355304240 in words is "two hundred forty-three billion, three hundred fifty-five million, three hundred four thousand, two hundred forty".