243124255540 has 12 divisors (see below), whose sum is σ = 510560936676. Its totient is φ = 97249702208.

The previous prime is 243124255499. The next prime is 243124255541. The reversal of 243124255540 is 45552421342.

It can be written as a sum of positive squares in 2 ways, for example, as 112920193296 + 130204062244 = 336036^2 + 360838^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 243124255540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243124255541) 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, 6078106369 + ... + 6078106408.

It is an arithmetic number, because the mean of its divisors is an integer number (42546744723).

Almost surely, 2^243124255540 is an apocalyptic number.

243124255540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243124255540 is an abundant number, since it is smaller than the sum of its proper divisors (267436681136).

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

243124255540 is a wasteful number, since it uses less digits than its factorization.

243124255540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12156212786 (or 12156212784 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 243124255540 its reverse (45552421342), we get a palindrome (288676676882).

The spelling of 243124255540 in words is "two hundred forty-three billion, one hundred twenty-four million, two hundred fifty-five thousand, five hundred forty".