243136140 has 48 divisors (see below), whose sum is σ = 733151328. Its totient is φ = 59848704.

The previous prime is 243136129. The next prime is 243136169. The reversal of 243136140 is 41631342.

It is a self number, because there is not a number n which added to its sum of digits gives 243136140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155077 + ... + 156636.

It is an arithmetic number, because the mean of its divisors is an integer number (15273986).

Almost surely, 2^243136140 is an apocalyptic number.

243136140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243136140 is an abundant number, since it is smaller than the sum of its proper divisors (490015188).

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

243136140 is a wasteful number, since it uses less digits than its factorization.

243136140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311738 (or 311736 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 243136140 is about 15592.8233492206. The cubic root of 243136140 is about 624.1416612135.

Adding to 243136140 its reverse (41631342), we get a palindrome (284767482).

The spelling of 243136140 in words is "two hundred forty-three million, one hundred thirty-six thousand, one hundred forty".