242244021 has 16 divisors (see below), whose sum is σ = 327495168. Its totient is φ = 159260400.

The previous prime is 242244019. The next prime is 242244043. The reversal of 242244021 is 120442242.

It is not a de Polignac number, because 242244021 - 2¹ = 242244019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242244011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63786 + ... + 67476.

It is an arithmetic number, because the mean of its divisors is an integer number (20468448).

Almost surely, 2^242244021 is an apocalyptic number.

It is an amenable number.

242244021 is a deficient number, since it is larger than the sum of its proper divisors (85251147).

242244021 is a wasteful number, since it uses less digits than its factorization.

242244021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 242244021 is about 15564.1903419356. The cubic root of 242244021 is about 623.3773554720.

Adding to 242244021 its reverse (120442242), we get a palindrome (362686263).

The spelling of 242244021 in words is "two hundred forty-two million, two hundred forty-four thousand, twenty-one".