242555044221 has 48 divisors (see below), whose sum is σ = 421604726400. Its totient is φ = 131269901184.

The previous prime is 242555044219. The next prime is 242555044279. The reversal of 242555044221 is 122440555242.

242555044221 is a `hidden beast` number, since 2 + 42 + 5 + 550 + 4 + 42 + 21 = 666.

242555044221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242555044221 - 2¹ = 242555044219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242555044621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4373815 + ... + 4428923.

It is an arithmetic number, because the mean of its divisors is an integer number (8783431800).

Almost surely, 2^242555044221 is an apocalyptic number.

242555044221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242555044221 is a deficient number, since it is larger than the sum of its proper divisors (179049682179).

242555044221 is a wasteful number, since it uses less digits than its factorization.

242555044221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58818 (or 58815 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 242555044221 its reverse (122440555242), we get a palindrome (364995599463).

The spelling of 242555044221 in words is "two hundred forty-two billion, five hundred fifty-five million, forty-four thousand, two hundred twenty-one".