243000000 has 294 divisors, whose sum is σ = 902879068. Its totient is φ = 64800000.

The previous prime is 242999963. The next prime is 243000007. The reversal of 243000000 is 342.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (243000007) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 48599998 + ... + 48600002.

Almost surely, 2^243000000 is an apocalyptic number.

243000000 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 243000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451439534).

243000000 is an abundant number, since it is smaller than the sum of its proper divisors (659879068).

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

243000000 is an frugal number, since it uses more digits than its factorization.

243000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 243000000 is about 15588.4572681199. The cubic root of 243000000 is about 624.0251469156.

Multiplying 243000000 by its product of nonzero digits (24), we get a cube (5832000000 = 1800³).

Adding to 243000000 its reverse (342), we get a palindrome (243000342).

The spelling of 243000000 in words is "two hundred forty-three million", and thus it is an aban number.