243378550 has 24 divisors (see below), whose sum is σ = 453096000. Its totient is φ = 97262880.

The previous prime is 243378547. The next prime is 243378559. The reversal of 243378550 is 55873342.

243378550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243378559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100251 + ... + 102649.

It is an arithmetic number, because the mean of its divisors is an integer number (18879000).

Almost surely, 2^243378550 is an apocalyptic number.

243378550 is a deficient number, since it is larger than the sum of its proper divisors (209717450).

243378550 is a wasteful number, since it uses less digits than its factorization.

243378550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440 (or 4435 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 243378550 is about 15600.5945399526. The cubic root of 243378550 is about 624.3490181917.

The spelling of 243378550 in words is "two hundred forty-three million, three hundred seventy-eight thousand, five hundred fifty".