242030221 has 4 divisors (see below), whose sum is σ = 242950752. Its totient is φ = 241109692.

The previous prime is 242030161. The next prime is 242030231. The reversal of 242030221 is 122030242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122030242 = 2 ⋅61015121.

It is a cyclic number.

It is not a de Polignac number, because 242030221 - 2¹⁷ = 241899149 is a prime.

It is a super-3 number, since 3×242030221³ (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 = 242030195 and 242030204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242030231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459871 + ... + 460396.

It is an arithmetic number, because the mean of its divisors is an integer number (60737688).

Almost surely, 2^242030221 is an apocalyptic number.

It is an amenable number.

242030221 is a deficient number, since it is larger than the sum of its proper divisors (920531).

242030221 is an equidigital number, since it uses as much as digits as its factorization.

242030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920530.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 242030221 is about 15557.3204955095. The cubic root of 242030221 is about 623.1939077969.

Adding to 242030221 its reverse (122030242), we get a palindrome (364060463).

The spelling of 242030221 in words is "two hundred forty-two million, thirty thousand, two hundred twenty-one".