243755240 has 16 divisors (see below), whose sum is σ = 548449380. Its totient is φ = 97502080.

The previous prime is 243755227. The next prime is 243755243. The reversal of 243755240 is 42557342.

243755240 is digitally balanced in base 2, 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 2 ways, for example, as 201583204 + 42172036 = 14198^2 + 6494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243755197 and 243755206.

It is not an unprimeable number, because it can be changed into a prime (243755243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3046901 + ... + 3046980.

Almost surely, 2^243755240 is an apocalyptic number.

243755240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243755240 is an abundant number, since it is smaller than the sum of its proper divisors (304694140).

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

243755240 is a wasteful number, since it uses less digits than its factorization.

243755240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6093892 (or 6093888 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 243755240 is about 15612.6628093993. The cubic root of 243755240 is about 624.6709649412.

The spelling of 243755240 in words is "two hundred forty-three million, seven hundred fifty-five thousand, two hundred forty".