204215143 has 4 divisors (see below), whose sum is σ = 222780168. Its totient is φ = 185650120.

The previous prime is 204215131. The next prime is 204215147. The reversal of 204215143 is 341512402.

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 204215143 - 2¹⁷ = 204084071 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 (204215147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9282496 + ... + 9282517.

It is an arithmetic number, because the mean of its divisors is an integer number (55695042).

Almost surely, 2^204215143 is an apocalyptic number.

204215143 is a deficient number, since it is larger than the sum of its proper divisors (18565025).

204215143 is a wasteful number, since it uses less digits than its factorization.

204215143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18565024.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 204215143 is about 14290.3863838596. The cubic root of 204215143 is about 588.8834028298.

Adding to 204215143 its reverse (341512402), we get a palindrome (545727545).

The spelling of 204215143 in words is "two hundred four million, two hundred fifteen thousand, one hundred forty-three".