204136545 has 8 divisors (see below), whose sum is σ = 326618496. Its totient is φ = 108872816.

The previous prime is 204136489. The next prime is 204136547. The reversal of 204136545 is 545631402.

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

It is a cyclic number.

It is not a de Polignac number, because 204136545 - 2¹² = 204132449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204136547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6804537 + ... + 6804566.

It is an arithmetic number, because the mean of its divisors is an integer number (40827312).

Almost surely, 2^204136545 is an apocalyptic number.

It is an amenable number.

204136545 is a deficient number, since it is larger than the sum of its proper divisors (122481951).

204136545 is a wasteful number, since it uses less digits than its factorization.

204136545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13609111.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 204136545 is about 14287.6360885907. The cubic root of 204136545 is about 588.8078436323.

Adding to 204136545 its reverse (545631402), we get a palindrome (749767947).

The spelling of 204136545 in words is "two hundred four million, one hundred thirty-six thousand, five hundred forty-five".