202242221 has 4 divisors (see below), whose sum is σ = 202407744. Its totient is φ = 202076700.

The previous prime is 202242179. The next prime is 202242253. The reversal of 202242221 is 122242202.

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: 122242202 = 2 ⋅61121101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202242221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202242221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202242281) 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, 80915 + ... + 83376.

It is an arithmetic number, because the mean of its divisors is an integer number (50601936).

Almost surely, 2^202242221 is an apocalyptic number.

It is an amenable number.

202242221 is a deficient number, since it is larger than the sum of its proper divisors (165523).

202242221 is a wasteful number, since it uses less digits than its factorization.

202242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165522.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 202242221 is about 14221.1891556227. The cubic root of 202242221 is about 586.9808624253.

Adding to 202242221 its reverse (122242202), we get a palindrome (324484423).

The spelling of 202242221 in words is "two hundred two million, two hundred forty-two thousand, two hundred twenty-one".