204214409 has 6 divisors (see below), whose sum is σ = 237555594. Its totient is φ = 175040880.

The previous prime is 204214403. The next prime is 204214429. The reversal of 204214409 is 904412402.

It can be written as a sum of positive squares in only one way, i.e., 188238400 + 15976009 = 13720^2 + 3997^2 .

It is not a de Polignac number, because 204214409 - 2⁴ = 204214393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204214403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2083772 + ... + 2083869.

It is an arithmetic number, because the mean of its divisors is an integer number (39592599).

Almost surely, 2^204214409 is an apocalyptic number.

It is an amenable number.

204214409 is a deficient number, since it is larger than the sum of its proper divisors (33341185).

204214409 is an equidigital number, since it uses as much as digits as its factorization.

204214409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167655 (or 4167648 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 204214409 is about 14290.3607022356. The cubic root of 204214409 is about 588.8826972979.

The spelling of 204214409 in words is "two hundred four million, two hundred fourteen thousand, four hundred nine".