243545000 has 80 divisors (see below), whose sum is σ = 579939360. Its totient is φ = 95832000.

The previous prime is 243544969. The next prime is 243545039. The reversal of 243545000 is 545342.

It is a super-3 number, since 3×243545000³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 334637 + ... + 335363.

It is an arithmetic number, because the mean of its divisors is an integer number (7249242).

Almost surely, 2^243545000 is an apocalyptic number.

243545000 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 243545000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289969680).

243545000 is an abundant number, since it is smaller than the sum of its proper divisors (336394360).

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

243545000 is an equidigital number, since it uses as much as digits as its factorization.

243545000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 243545000 is about 15605.9283607224. The cubic root of 243545000 is about 624.4913194362.

The spelling of 243545000 in words is "two hundred forty-three million, five hundred forty-five thousand".