204000243 has 16 divisors (see below), whose sum is σ = 281204736. Its totient is φ = 131411520.

The previous prime is 204000241. The next prime is 204000281. The reversal of 204000243 is 342000402.

It is a happy number.

It is not a de Polignac number, because 204000243 - 2¹ = 204000241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204000241) 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, 81255 + ... + 83727.

It is an arithmetic number, because the mean of its divisors is an integer number (17575296).

Almost surely, 2^204000243 is an apocalyptic number.

204000243 is a deficient number, since it is larger than the sum of its proper divisors (77204493).

204000243 is a wasteful number, since it uses less digits than its factorization.

204000243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 204000243 is about 14282.8653637847. The cubic root of 204000243 is about 588.6767654275.

Adding to 204000243 its reverse (342000402), we get a palindrome (546000645).

The spelling of 204000243 in words is "two hundred four million, two hundred forty-three", and thus it is an aban number.