204242207 has 4 divisors (see below), whose sum is σ = 219953160. Its totient is φ = 188531256.

The previous prime is 204242173. The next prime is 204242209. The reversal of 204242207 is 702242402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702242402 = 2 ⋅351121201.

It is a cyclic number.

It is not a de Polignac number, because 204242207 - 2²⁶ = 137133343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204242209) 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, 7855457 + ... + 7855482.

It is an arithmetic number, because the mean of its divisors is an integer number (54988290).

Almost surely, 2^204242207 is an apocalyptic number.

204242207 is a deficient number, since it is larger than the sum of its proper divisors (15710953).

204242207 is a wasteful number, since it uses less digits than its factorization.

204242207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15710952.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 204242207 is about 14291.3332827977. Note that the first 3 decimals coincide. The cubic root of 204242207 is about 588.9094159782.

Adding to 204242207 its reverse (702242402), we get a palindrome (906484609).

The spelling of 204242207 in words is "two hundred four million, two hundred forty-two thousand, two hundred seven".