243021140 has 24 divisors (see below), whose sum is σ = 513203040. Its totient is φ = 96663968.

The previous prime is 243021139. The next prime is 243021157. The reversal of 243021140 is 41120342.

It is a congruent number.

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, 30362 + ... + 37521.

It is an arithmetic number, because the mean of its divisors is an integer number (21383460).

Almost surely, 2^243021140 is an apocalyptic number.

243021140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243021140 is an abundant number, since it is smaller than the sum of its proper divisors (270181900).

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

243021140 is a wasteful number, since it uses less digits than its factorization.

243021140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68071 (or 68069 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 243021140 is about 15589.1353191895. The cubic root of 243021140 is about 624.0432422641.

Adding to 243021140 its reverse (41120342), we get a palindrome (284141482).

The spelling of 243021140 in words is "two hundred forty-three million, twenty-one thousand, one hundred forty".