243320000 has 280 divisors, whose sum is σ = 761756160. Its totient is φ = 74880000.

The previous prime is 243319991. The next prime is 243320017. The reversal of 243320000 is 23342.

It is a tau number, because it is divible by the number of its divisors (280).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3079961 + ... + 3080039.

Almost surely, 2^243320000 is an apocalyptic number.

243320000 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 243320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380878080).

243320000 is an abundant number, since it is smaller than the sum of its proper divisors (518436160).

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

243320000 is an equidigital number, since it uses as much as digits as its factorization.

243320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 243320000 is about 15598.7178960324. The cubic root of 243320000 is about 624.2989472675.

Adding to 243320000 its reverse (23342), we get a palindrome (243343342).

The spelling of 243320000 in words is "two hundred forty-three million, three hundred twenty thousand".