242340221 has 8 divisors (see below), whose sum is σ = 247246560. Its totient is φ = 237446352.

The previous prime is 242340209. The next prime is 242340229. The reversal of 242340221 is 122043242.

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

It is a cyclic number.

It is not a de Polignac number, because 242340221 - 2⁶ = 242340157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242340193 and 242340202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242340229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42866 + ... + 48188.

It is an arithmetic number, because the mean of its divisors is an integer number (30905820).

Almost surely, 2^242340221 is an apocalyptic number.

It is an amenable number.

242340221 is a deficient number, since it is larger than the sum of its proper divisors (4906339).

242340221 is an equidigital number, since it uses as much as digits as its factorization.

242340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6235.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 242340221 is about 15567.2804625599. The cubic root of 242340221 is about 623.4598631363.

Adding to 242340221 its reverse (122043242), we get a palindrome (364383463).

The spelling of 242340221 in words is "two hundred forty-two million, three hundred forty thousand, two hundred twenty-one".