243801816 has 32 divisors (see below), whose sum is σ = 610526400. Its totient is φ = 81131040.

The previous prime is 243801791. The next prime is 243801829. The reversal of 243801816 is 618108342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6651 + ... + 23061.

It is an arithmetic number, because the mean of its divisors is an integer number (19078950).

Almost surely, 2^243801816 is an apocalyptic number.

It is an amenable number.

243801816 is an abundant number, since it is smaller than the sum of its proper divisors (366724584).

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

243801816 is a wasteful number, since it uses less digits than its factorization.

243801816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17039 (or 17035 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 243801816 is about 15614.1543478986. The cubic root of 243801816 is about 624.7107491416.

The spelling of 243801816 in words is "two hundred forty-three million, eight hundred one thousand, eight hundred sixteen".