243801115 has 16 divisors (see below), whose sum is σ = 304430400. Its totient is φ = 187207552.

The previous prime is 243801091. The next prime is 243801119. The reversal of 243801115 is 511108342.

It is a cyclic number.

It is not a de Polignac number, because 243801115 - 2⁹ = 243800603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243801115.

It is not an unprimeable number, because it can be changed into a prime (243801119) 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, 20226 + ... + 29944.

It is an arithmetic number, because the mean of its divisors is an integer number (19026900).

Almost surely, 2^243801115 is an apocalyptic number.

243801115 is a deficient number, since it is larger than the sum of its proper divisors (60629285).

243801115 is a wasteful number, since it uses less digits than its factorization.

243801115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9926.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 243801115 is about 15614.1319003011. The cubic root of 243801115 is about 624.7101504003.

Adding to 243801115 its reverse (511108342), we get a palindrome (754909457).

The spelling of 243801115 in words is "two hundred forty-three million, eight hundred one thousand, one hundred fifteen".