204221143 has 4 divisors (see below), whose sum is σ = 233395600. Its totient is φ = 175046688.

The previous prime is 204221111. The next prime is 204221197. The reversal of 204221143 is 341122402.

204221143 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.

It is a cyclic number.

It is not a de Polignac number, because 204221143 - 2⁵ = 204221111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204221143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204221543) 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, 14587218 + ... + 14587231.

It is an arithmetic number, because the mean of its divisors is an integer number (58348900).

Almost surely, 2^204221143 is an apocalyptic number.

204221143 is a deficient number, since it is larger than the sum of its proper divisors (29174457).

204221143 is an equidigital number, since it uses as much as digits as its factorization.

204221143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29174456.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 204221143 is about 14290.5963136603. The cubic root of 204221143 is about 588.8891700577.

Adding to 204221143 its reverse (341122402), we get a palindrome (545343545).

The spelling of 204221143 in words is "two hundred four million, two hundred twenty-one thousand, one hundred forty-three".