204143236 has 24 divisors (see below), whose sum is σ = 390356064. Its totient is φ = 92642880.

The previous prime is 204143221. The next prime is 204143243. The reversal of 204143236 is 632341402.

It is a self number, because there is not a number n which added to its sum of digits gives 204143236.

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 7 ways as a sum of consecutive naturals, for example, 26656 + ... + 33448.

It is an arithmetic number, because the mean of its divisors is an integer number (16264836).

Almost surely, 2^204143236 is an apocalyptic number.

It is an amenable number.

204143236 is a deficient number, since it is larger than the sum of its proper divisors (186212828).

204143236 is a wasteful number, since it uses less digits than its factorization.

204143236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7491 (or 7489 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 204143236 is about 14287.8702401723. The cubic root of 204143236 is about 588.8142766961.

Adding to 204143236 its reverse (632341402), we get a palindrome (836484638).

The spelling of 204143236 in words is "two hundred four million, one hundred forty-three thousand, two hundred thirty-six".