204243401 has 4 divisors (see below), whose sum is σ = 205496592. Its totient is φ = 202990212.

The previous prime is 204243371. The next prime is 204243439. The reversal of 204243401 is 104342402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104342402 = 2 ⋅52171201.

It is a cyclic number.

It is not a de Polignac number, because 204243401 - 2⁶ = 204243337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204243461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626351 + ... + 626676.

It is an arithmetic number, because the mean of its divisors is an integer number (51374148).

Almost surely, 2^204243401 is an apocalyptic number.

It is an amenable number.

204243401 is a deficient number, since it is larger than the sum of its proper divisors (1253191).

204243401 is a wasteful number, since it uses less digits than its factorization.

204243401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253190.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 204243401 is about 14291.3750563058. The cubic root of 204243401 is about 588.9105635641.

Adding to 204243401 its reverse (104342402), we get a palindrome (308585803).

Subtracting from 204243401 its reverse (104342402), we obtain a palindrome (99900999).

The spelling of 204243401 in words is "two hundred four million, two hundred forty-three thousand, four hundred one".