204257239 has 4 divisors (see below), whose sum is σ = 215007640. Its totient is φ = 193506840.

The previous prime is 204257213. The next prime is 204257293. The reversal of 204257239 is 932752402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204257239 - 2⁹ = 204256727 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 (204257539) by changing a digit.

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, 5375172 + ... + 5375209.

It is an arithmetic number, because the mean of its divisors is an integer number (53751910).

Almost surely, 2^204257239 is an apocalyptic number.

204257239 is a deficient number, since it is larger than the sum of its proper divisors (10750401).

204257239 is a wasteful number, since it uses less digits than its factorization.

204257239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10750400.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 204257239 is about 14291.8591862640. The cubic root of 204257239 is about 588.9238633171.

The spelling of 204257239 in words is "two hundred four million, two hundred fifty-seven thousand, two hundred thirty-nine".