242309218 has 8 divisors (see below), whose sum is σ = 363936348. Its totient is φ = 120997104.

The previous prime is 242309213. The next prime is 242309227. The reversal of 242309218 is 812903242.

It can be written as a sum of positive squares in 2 ways, for example, as 223412809 + 18896409 = 14947^2 + 4347^2 .

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 242309218.

It is not an unprimeable number, because it can be changed into a prime (242309213) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 76821 + ... + 79912.

Almost surely, 2^242309218 is an apocalyptic number.

242309218 is a deficient number, since it is larger than the sum of its proper divisors (121627130).

242309218 is a wasteful number, since it uses less digits than its factorization.

242309218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157508.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 242309218 is about 15566.2846562691. The cubic root of 242309218 is about 623.4332752393.

The spelling of 242309218 in words is "two hundred forty-two million, three hundred nine thousand, two hundred eighteen".