242239321 has 4 divisors (see below), whose sum is σ = 242270644. Its totient is φ = 242208000.

The previous prime is 242239313. The next prime is 242239337. The reversal of 242239321 is 123932242.

242239321 is digitally balanced in base 2, 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 143137296 + 99102025 = 11964^2 + 9955^2 .

It is a 3-Lehmer number, since φ(242239321) divides (242239321-1)³.

It is a cyclic number.

It is not a de Polignac number, because 242239321 - 2³ = 242239313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242239321.

It is not an unprimeable number, because it can be changed into a prime (242239421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5221 + ... + 22621.

It is an arithmetic number, because the mean of its divisors is an integer number (60567661).

It is a Poulet number, since it divides 2^242239320-1.

Almost surely, 2^242239321 is an apocalyptic number.

It is an amenable number.

242239321 is a deficient number, since it is larger than the sum of its proper divisors (31323).

242239321 is a wasteful number, since it uses less digits than its factorization.

242239321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31322.

The product of its digits is 5184, while the sum is 28.

The square root of 242239321 is about 15564.0393535868. The cubic root of 242239321 is about 623.3733238727.

The spelling of 242239321 in words is "two hundred forty-two million, two hundred thirty-nine thousand, three hundred twenty-one".