243345000 has 80 divisors (see below), whose sum is σ = 760256640. Its totient is φ = 64888000.

The previous prime is 243344977. The next prime is 243345023. The reversal of 243345000 is 543342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243344977) and next prime (243345023).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6889 + ... + 23111.

It is an arithmetic number, because the mean of its divisors is an integer number (9503208).

Almost surely, 2^243345000 is an apocalyptic number.

243345000 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 243345000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380128320).

243345000 is an abundant number, since it is smaller than the sum of its proper divisors (516911640).

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

243345000 is a wasteful number, since it uses less digits than its factorization.

243345000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16252 (or 16233 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 243345000 is about 15599.5192233607. The cubic root of 243345000 is about 624.3203278077.

Adding to 243345000 its reverse (543342), we get a palindrome (243888342).

The spelling of 243345000 in words is "two hundred forty-three million, three hundred forty-five thousand".