242204221 has 16 divisors (see below), whose sum is σ = 282267648. Its totient is φ = 203529600.

The previous prime is 242204189. The next prime is 242204239. The reversal of 242204221 is 122402242.

It is a cyclic number.

It is not a de Polignac number, because 242204221 - 2⁵ = 242204189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242204021) 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, 162801 + ... + 164281.

It is an arithmetic number, because the mean of its divisors is an integer number (17641728).

Almost surely, 2^242204221 is an apocalyptic number.

It is an amenable number.

242204221 is a deficient number, since it is larger than the sum of its proper divisors (40063427).

242204221 is a wasteful number, since it uses less digits than its factorization.

242204221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 242204221 is about 15562.9117134295. The cubic root of 242204221 is about 623.3432138965.

Adding to 242204221 its reverse (122402242), we get a palindrome (364606463).

It can be divided in two parts, 24220 and 4221, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 242204221 in words is "two hundred forty-two million, two hundred four thousand, two hundred twenty-one".