243243020 has 24 divisors (see below), whose sum is σ = 516080544. Its totient is φ = 96293376.

The previous prime is 243242999. The next prime is 243243043. The reversal of 243243020 is 20342342.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 243242983 and 243243001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60752 + ... + 64631.

It is an arithmetic number, because the mean of its divisors is an integer number (21503356).

Almost surely, 2^243243020 is an apocalyptic number.

243243020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243243020 is an abundant number, since it is smaller than the sum of its proper divisors (272837524).

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

243243020 is a wasteful number, since it uses less digits than its factorization.

243243020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125489 (or 125487 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 243243020 is about 15596.2501903502. The cubic root of 243243020 is about 624.2331031089.

Adding to 243243020 its reverse (20342342), we get a palindrome (263585362).

The spelling of 243243020 in words is "two hundred forty-three million, two hundred forty-three thousand, twenty".