243121244550 has 48 divisors (see below), whose sum is σ = 603625396752. Its totient is φ = 64758707200.

The previous prime is 243121244417. The next prime is 243121244557. The reversal of 243121244550 is 55442121342.

243121244550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121244557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 787719 + ... + 1052018.

It is an arithmetic number, because the mean of its divisors is an integer number (12575529099).

Almost surely, 2^243121244550 is an apocalyptic number.

243121244550 is an abundant number, since it is smaller than the sum of its proper divisors (360504152202).

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

243121244550 is a wasteful number, since it uses less digits than its factorization.

243121244550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840633 (or 1840628 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 243121244550 its reverse (55442121342), we get a palindrome (298563365892).

The spelling of 243121244550 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-four thousand, five hundred fifty".