243232433540 has 12 divisors (see below), whose sum is σ = 510788110476. Its totient is φ = 97292973408.

The previous prime is 243232433489. The next prime is 243232433557. The reversal of 243232433540 is 45334232342.

It can be written as a sum of positive squares in 2 ways, for example, as 69450169156 + 173782264384 = 263534^2 + 416872^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 243232433540.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6080810819 + ... + 6080810858.

It is an arithmetic number, because the mean of its divisors is an integer number (42565675873).

Almost surely, 2^243232433540 is an apocalyptic number.

243232433540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243232433540 is an abundant number, since it is smaller than the sum of its proper divisors (267555676936).

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

243232433540 is a wasteful number, since it uses less digits than its factorization.

243232433540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12161621686 (or 12161621684 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 35.

Adding to 243232433540 its reverse (45334232342), we get a palindrome (288566665882).

The spelling of 243232433540 in words is "two hundred forty-three billion, two hundred thirty-two million, four hundred thirty-three thousand, five hundred forty".