204240143 has 4 divisors (see below), whose sum is σ = 204268848. Its totient is φ = 204211440.

The previous prime is 204240131. The next prime is 204240149. The reversal of 204240143 is 341042402.

204240143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 341042402 = 2 ⋅170521201.

It is a cyclic number.

It is not a de Polignac number, because 204240143 - 2²⁶ = 137131279 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 (204240149) 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, 5198 + ... + 20868.

It is an arithmetic number, because the mean of its divisors is an integer number (51067212).

Almost surely, 2^204240143 is an apocalyptic number.

204240143 is a deficient number, since it is larger than the sum of its proper divisors (28705).

204240143 is a wasteful number, since it uses less digits than its factorization.

204240143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28704.

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

The square root of 204240143 is about 14291.2610710182. The cubic root of 204240143 is about 588.9074322009.

Adding to 204240143 its reverse (341042402), we get a palindrome (545282545).

The spelling of 204240143 in words is "two hundred four million, two hundred forty thousand, one hundred forty-three".