243255020 has 48 divisors (see below), whose sum is σ = 527011968. Its totient is φ = 94245120.

The previous prime is 243255011. The next prime is 243255071. The reversal of 243255020 is 20552342.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199934 + ... + 201146.

It is an arithmetic number, because the mean of its divisors is an integer number (10979416).

Almost surely, 2^243255020 is an apocalyptic number.

243255020 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 243255020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263505984).

243255020 is an abundant number, since it is smaller than the sum of its proper divisors (283756948).

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

243255020 is a wasteful number, since it uses less digits than its factorization.

243255020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530 (or 1528 counting only the distinct ones).

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

The square root of 243255020 is about 15596.6348934634. The cubic root of 243255020 is about 624.2433681161.

The spelling of 243255020 in words is "two hundred forty-three million, two hundred fifty-five thousand, twenty".