204243000 has 128 divisors (see below), whose sum is σ = 686387520. Its totient is φ = 50265600.

The previous prime is 204242999. The next prime is 204243007. The reversal of 204243000 is 342402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204243007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36382 + ... + 41618.

Almost surely, 2^204243000 is an apocalyptic number.

204243000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204243000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343193760).

204243000 is an abundant number, since it is smaller than the sum of its proper divisors (482144520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204243000 is a wasteful number, since it uses less digits than its factorization.

204243000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5274 (or 5260 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 204243000 is about 14291.3610268581. The cubic root of 204243000 is about 588.9101781526.

Adding to 204243000 its reverse (342402), we get a palindrome (204585402).

The spelling of 204243000 in words is "two hundred four million, two hundred forty-three thousand".