204340401 has 12 divisors (see below), whose sum is σ = 306090512. Its totient is φ = 136226772.

The previous prime is 204340399. The next prime is 204340403. The reversal of 204340401 is 104043402.

It is an interprime number because it is at equal distance from previous prime (204340399) and next prime (204340403).

It is not a de Polignac number, because 204340401 - 2¹ = 204340399 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204340403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 420211 + ... + 420696.

Almost surely, 2^204340401 is an apocalyptic number.

It is an amenable number.

204340401 is a deficient number, since it is larger than the sum of its proper divisors (101750111).

204340401 is an frugal number, since it uses more digits than its factorization.

204340401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840922 (or 840910 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 204340401 is about 14294.7683087205. The cubic root of 204340401 is about 589.0037779733.

Adding to 204340401 its reverse (104043402), we get a palindrome (308383803).

The spelling of 204340401 in words is "two hundred four million, three hundred forty thousand, four hundred one".