243241143440 has 80 divisors (see below), whose sum is σ = 569213568000. Its totient is φ = 96664995840.

The previous prime is 243241143359. The next prime is 243241143449. The reversal of 243241143440 is 44341142342.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 243241143397 and 243241143406.

It is not an unprimeable number, because it can be changed into a prime (243241143449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12626936 + ... + 12646184.

It is an arithmetic number, because the mean of its divisors is an integer number (7115169600).

Almost surely, 2^243241143440 is an apocalyptic number.

243241143440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243241143440 is an abundant number, since it is smaller than the sum of its proper divisors (325972424560).

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

243241143440 is a wasteful number, since it uses less digits than its factorization.

243241143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20280 (or 20274 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 243241143440 its reverse (44341142342), we get a palindrome (287582285782).

The spelling of 243241143440 in words is "two hundred forty-three billion, two hundred forty-one million, one hundred forty-three thousand, four hundred forty".