204323143 has 4 divisors (see below), whose sum is σ = 209074888. Its totient is φ = 199571400.

The previous prime is 204323129. The next prime is 204323149. The reversal of 204323143 is 341323402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204323143 - 2⁹ = 204322631 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 (204323149) 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, 2375808 + ... + 2375893.

It is an arithmetic number, because the mean of its divisors is an integer number (52268722).

Almost surely, 2^204323143 is an apocalyptic number.

204323143 is a deficient number, since it is larger than the sum of its proper divisors (4751745).

204323143 is an equidigital number, since it uses as much as digits as its factorization.

204323143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751744.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 204323143 is about 14294.1646485550. The cubic root of 204323143 is about 588.9871956539.

Adding to 204323143 its reverse (341323402), we get a palindrome (545646545).

The spelling of 204323143 in words is "two hundred four million, three hundred twenty-three thousand, one hundred forty-three".