243243166 has 4 divisors (see below), whose sum is σ = 364864752. Its totient is φ = 121621582.

The previous prime is 243243163. The next prime is 243243179. The reversal of 243243166 is 661342342.

243243166 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243243163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60810790 + ... + 60810793.

It is an arithmetic number, because the mean of its divisors is an integer number (91216188).

Almost surely, 2^243243166 is an apocalyptic number.

243243166 is a deficient number, since it is larger than the sum of its proper divisors (121621586).

243243166 is a wasteful number, since it uses less digits than its factorization.

243243166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121621585.

The product of its digits is 20736, while the sum is 31.

The square root of 243243166 is about 15596.2548709618. The cubic root of 243243166 is about 624.2332280018.

The spelling of 243243166 in words is "two hundred forty-three million, two hundred forty-three thousand, one hundred sixty-six".