242311221 has 24 divisors (see below), whose sum is σ = 364915200. Its totient is φ = 154764000.

The previous prime is 242311219. The next prime is 242311241. The reversal of 242311221 is 122113242.

It is a happy number.

It is not a de Polignac number, because 242311221 - 2¹ = 242311219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242311194 and 242311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242311241) 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 23 ways as a sum of consecutive naturals, for example, 23880 + ... + 32478.

It is an arithmetic number, because the mean of its divisors is an integer number (15204800).

Almost surely, 2^242311221 is an apocalyptic number.

It is an amenable number.

242311221 is a deficient number, since it is larger than the sum of its proper divisors (122603979).

242311221 is a wasteful number, since it uses less digits than its factorization.

242311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8737 (or 8734 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 242311221 is about 15566.3489939035. The cubic root of 242311221 is about 623.4349930628.

Adding to 242311221 its reverse (122113242), we get a palindrome (364424463).

It can be divided in two parts, 24231 and 1221, that added together give a palindrome (25452).

The spelling of 242311221 in words is "two hundred forty-two million, three hundred eleven thousand, two hundred twenty-one".