243512140 has 12 divisors (see below), whose sum is σ = 511375536. Its totient is φ = 97404848.

The previous prime is 243512083. The next prime is 243512141. The reversal of 243512140 is 41215342.

243512140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (243512141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6087784 + ... + 6087823.

It is an arithmetic number, because the mean of its divisors is an integer number (42614628).

Almost surely, 2^243512140 is an apocalyptic number.

243512140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243512140 is an abundant number, since it is smaller than the sum of its proper divisors (267863396).

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

243512140 is a wasteful number, since it uses less digits than its factorization.

243512140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175616 (or 12175614 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 243512140 is about 15604.8755201700. The cubic root of 243512140 is about 624.4632319401.

Adding to 243512140 its reverse (41215342), we get a palindrome (284727482).

The spelling of 243512140 in words is "two hundred forty-three million, five hundred twelve thousand, one hundred forty".