204354145 has 16 divisors (see below), whose sum is σ = 252354960. Its totient is φ = 158747904.

The previous prime is 204354131. The next prime is 204354151. The reversal of 204354145 is 541453402.

It can be written as a sum of positive squares in 8 ways, for example, as 26718561 + 177635584 = 5169^2 + 13328^2 .

It is a cyclic number.

It is not a de Polignac number, because 204354145 - 2⁵ = 204354113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142291 + ... + 143719.

It is an arithmetic number, because the mean of its divisors is an integer number (15772185).

Almost surely, 2^204354145 is an apocalyptic number.

It is an amenable number.

204354145 is a deficient number, since it is larger than the sum of its proper divisors (48000815).

204354145 is a wasteful number, since it uses less digits than its factorization.

204354145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 204354145 is about 14295.2490359560. The cubic root of 204354145 is about 589.0169832040.

The spelling of 204354145 in words is "two hundred four million, three hundred fifty-four thousand, one hundred forty-five".