242144221 has 8 divisors (see below), whose sum is σ = 265932000. Its totient is φ = 218652240.

The previous prime is 242144183. The next prime is 242144239. The reversal of 242144221 is 122441242.

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 242144221 - 2⁷ = 242144093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242144192 and 242144201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242144291) 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 7 ways as a sum of consecutive naturals, for example, 72231 + ... + 75508.

It is an arithmetic number, because the mean of its divisors is an integer number (33241500).

Almost surely, 2^242144221 is an apocalyptic number.

It is an amenable number.

242144221 is a deficient number, since it is larger than the sum of its proper divisors (23787779).

242144221 is a wasteful number, since it uses less digits than its factorization.

242144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147899.

The product of its digits is 1024, while the sum is 22.

The square root of 242144221 is about 15560.9839341862. The cubic root of 242144221 is about 623.2917371145.

Adding to 242144221 its reverse (122441242), we get a palindrome (364585463).

The spelling of 242144221 in words is "two hundred forty-two million, one hundred forty-four thousand, two hundred twenty-one".