242333221 has 16 divisors (see below), whose sum is σ = 273490560. Its totient is φ = 213048000.

The previous prime is 242333219. The next prime is 242333227. The reversal of 242333221 is 122333242.

It is a cyclic number.

It is not a de Polignac number, because 242333221 - 2¹ = 242333219 is a prime.

It is a super-3 number, since 3×242333221³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242333192 and 242333201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242333227) 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, 73435 + ... + 76663.

It is an arithmetic number, because the mean of its divisors is an integer number (17093160).

Almost surely, 2^242333221 is an apocalyptic number.

It is an amenable number.

242333221 is a deficient number, since it is larger than the sum of its proper divisors (31157339).

242333221 is a wasteful number, since it uses less digits than its factorization.

242333221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516.

The product of its digits is 1728, while the sum is 22.

The square root of 242333221 is about 15567.0556304010. The cubic root of 242333221 is about 623.4538601968.

Adding to 242333221 its reverse (122333242), we get a palindrome (364666463).

The spelling of 242333221 in words is "two hundred forty-two million, three hundred thirty-three thousand, two hundred twenty-one".