204111545 has 32 divisors (see below), whose sum is σ = 280247040. Its totient is φ = 141264640.

The previous prime is 204111539. The next prime is 204111559. The reversal of 204111545 is 545111402.

It is not a de Polignac number, because 204111545 - 2¹⁴ = 204095161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 204111545.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400751 + ... + 401259.

It is an arithmetic number, because the mean of its divisors is an integer number (8757720).

Almost surely, 2^204111545 is an apocalyptic number.

It is an amenable number.

204111545 is a deficient number, since it is larger than the sum of its proper divisors (76135495).

204111545 is a wasteful number, since it uses less digits than its factorization.

204111545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 204111545 is about 14286.7611794976. The cubic root of 204111545 is about 588.7838061316.

Adding to 204111545 its reverse (545111402), we get a palindrome (749222947).

The spelling of 204111545 in words is "two hundred four million, one hundred eleven thousand, five hundred forty-five".