243722242 has 8 divisors (see below), whose sum is σ = 368818956. Its totient is φ = 120782592.

The previous prime is 243722233. The next prime is 243722243. The reversal of 243722242 is 242227342.

It can be written as a sum of positive squares in 2 ways, for example, as 154778481 + 88943761 = 12441^2 + 9431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 243722242.

It is not an unprimeable number, because it can be changed into a prime (243722243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538983 + ... + 539434.

Almost surely, 2^243722242 is an apocalyptic number.

243722242 is a deficient number, since it is larger than the sum of its proper divisors (125096714).

243722242 is a wasteful number, since it uses less digits than its factorization.

243722242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078532.

The product of its digits is 10752, while the sum is 28.

The square root of 243722242 is about 15611.6060032272. The cubic root of 243722242 is about 624.6427757042.

Adding to 243722242 its reverse (242227342), we get a palindrome (485949584).

The spelling of 243722242 in words is "two hundred forty-three million, seven hundred twenty-two thousand, two hundred forty-two".