204040201 has 4 divisors (see below), whose sum is σ = 211076100. Its totient is φ = 197004304.

The previous prime is 204040129. The next prime is 204040217. The reversal of 204040201 is 102040402.

204040201 = 10100² + 10101².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102040402 = 2 ⋅51020201.

It can be written as a sum of positive squares in 2 ways, for example, as 102010000 + 102030201 = 10100^2 + 10101^2 .

It is a cyclic number.

It is not a de Polignac number, because 204040201 - 2¹⁹ = 203515913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204040271) 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, 3517906 + ... + 3517963.

It is an arithmetic number, because the mean of its divisors is an integer number (52769025).

Almost surely, 2^204040201 is an apocalyptic number.

204040201 is the 10101-st centered square number.

It is an amenable number.

204040201 is a deficient number, since it is larger than the sum of its proper divisors (7035899).

204040201 is an equidigital number, since it uses as much as digits as its factorization.

204040201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035898.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 204040201 is about 14284.2641042512. The cubic root of 204040201 is about 588.7151980787.

Adding to 204040201 its reverse (102040402), we get a palindrome (306080603).

The spelling of 204040201 in words is "two hundred four million, forty thousand, two hundred one".