204245545 has 16 divisors (see below), whose sum is σ = 280425600. Its totient is φ = 139895424.

The previous prime is 204245527. The next prime is 204245549. The reversal of 204245545 is 545542402.

It is a cyclic number.

It is not a de Polignac number, because 204245545 - 2⁷ = 204245417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204245549) 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 15 ways as a sum of consecutive naturals, for example, 33934 + ... + 39496.

It is an arithmetic number, because the mean of its divisors is an integer number (17526600).

Almost surely, 2^204245545 is an apocalyptic number.

It is an amenable number.

204245545 is a deficient number, since it is larger than the sum of its proper divisors (76180055).

204245545 is a wasteful number, since it uses less digits than its factorization.

204245545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624.

The product of its (nonzero) digits is 32000, while the sum is 31.

The square root of 204245545 is about 14291.4500663858. The cubic root of 204245545 is about 588.9126242098.

Adding to 204245545 its reverse (545542402), we get a palindrome (749787947).

The spelling of 204245545 in words is "two hundred four million, two hundred forty-five thousand, five hundred forty-five".