242552218 has 4 divisors (see below), whose sum is σ = 363828330. Its totient is φ = 121276108.

The previous prime is 242552213. The next prime is 242552239. The reversal of 242552218 is 812255242.

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

It can be written as a sum of positive squares in only one way, i.e., 212488929 + 30063289 = 14577^2 + 5483^2 .

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 self number, because there is not a number n which added to its sum of digits gives 242552218.

It is not an unprimeable number, because it can be changed into a prime (242552213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60638053 + ... + 60638056.

Almost surely, 2^242552218 is an apocalyptic number.

242552218 is a deficient number, since it is larger than the sum of its proper divisors (121276112).

242552218 is a wasteful number, since it uses less digits than its factorization.

242552218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121276111.

The product of its digits is 12800, while the sum is 31.

The square root of 242552218 is about 15574.0880310855. The cubic root of 242552218 is about 623.6416091377.

The spelling of 242552218 in words is "two hundred forty-two million, five hundred fifty-two thousand, two hundred eighteen".