243979222 has 4 divisors (see below), whose sum is σ = 365968836. Its totient is φ = 121989610.

The previous prime is 243979123. The next prime is 243979243. The reversal of 243979222 is 222979342.

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

It is a Smith number, since the sum of its digits (40) 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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60994804 + ... + 60994807.

It is an arithmetic number, because the mean of its divisors is an integer number (91492209).

Almost surely, 2^243979222 is an apocalyptic number.

243979222 is a deficient number, since it is larger than the sum of its proper divisors (121989614).

243979222 is a wasteful number, since it uses less digits than its factorization.

243979222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121989613.

The product of its digits is 108864, while the sum is 40.

The square root of 243979222 is about 15619.8342500809. The cubic root of 243979222 is about 624.8622390773.

The spelling of 243979222 in words is "two hundred forty-three million, nine hundred seventy-nine thousand, two hundred twenty-two".