205221242 has 8 divisors (see below), whose sum is σ = 324033600. Its totient is φ = 97210044.

The previous prime is 205221227. The next prime is 205221253. The reversal of 205221242 is 242122502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2700242 + ... + 2700317.

It is an arithmetic number, because the mean of its divisors is an integer number (40504200).

Almost surely, 2^205221242 is an apocalyptic number.

205221242 is a deficient number, since it is larger than the sum of its proper divisors (118812358).

205221242 is a wasteful number, since it uses less digits than its factorization.

205221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400580.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 205221242 is about 14325.5450856154. The cubic root of 205221242 is about 589.8488955183.

Adding to 205221242 its reverse (242122502), we get a palindrome (447343744).

The spelling of 205221242 in words is "two hundred five million, two hundred twenty-one thousand, two hundred forty-two".