243121078 has 16 divisors (see below), whose sum is σ = 370440000. Its totient is φ = 119650752.

The previous prime is 243121057. The next prime is 243121079. The reversal of 243121078 is 870121342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121079) 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, 52938 + ... + 57346.

It is an arithmetic number, because the mean of its divisors is an integer number (23152500).

Almost surely, 2^243121078 is an apocalyptic number.

243121078 is a deficient number, since it is larger than the sum of its proper divisors (127318922).

243121078 is a wasteful number, since it uses less digits than its factorization.

243121078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 243121078 is about 15592.3403631398. The cubic root of 243121078 is about 624.1287726650.

The spelling of 243121078 in words is "two hundred forty-three million, one hundred twenty-one thousand, seventy-eight".