204145201 has 4 divisors (see below), whose sum is σ = 219848692. Its totient is φ = 188441712.

The previous prime is 204145187. The next prime is 204145213. The reversal of 204145201 is 102541402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102541402 = 2 ⋅51270701.

It can be written as a sum of positive squares in 2 ways, for example, as 50410000 + 153735201 = 7100^2 + 12399^2 .

It is a cyclic number.

It is not a de Polignac number, because 204145201 - 2¹³ = 204137009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204145001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7851726 + ... + 7851751.

It is an arithmetic number, because the mean of its divisors is an integer number (54962173).

Almost surely, 2^204145201 is an apocalyptic number.

It is an amenable number.

204145201 is a deficient number, since it is larger than the sum of its proper divisors (15703491).

204145201 is a wasteful number, since it uses less digits than its factorization.

204145201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15703490.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 204145201 is about 14287.9390046290. The cubic root of 204145201 is about 588.8161659191.

Adding to 204145201 its reverse (102541402), we get a palindrome (306686603).

The spelling of 204145201 in words is "two hundred four million, one hundred forty-five thousand, two hundred one".