204221238 has 64 divisors (see below), whose sum is σ = 468441792. Its totient is φ = 58798080.

The previous prime is 204221197. The next prime is 204221261. The reversal of 204221238 is 832122402.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308628 + ... + 309288.

It is an arithmetic number, because the mean of its divisors is an integer number (7319403).

Almost surely, 2^204221238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204221238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234220896).

204221238 is an abundant number, since it is smaller than the sum of its proper divisors (264220554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204221238 is a wasteful number, since it uses less digits than its factorization.

204221238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 204221238 is about 14290.5996375240. The cubic root of 204221238 is about 588.8892613713.

The spelling of 204221238 in words is "two hundred four million, two hundred twenty-one thousand, two hundred thirty-eight".