243021104505 has 12 divisors (see below), whose sum is σ = 421236581220. Its totient is φ = 129611255712.

The previous prime is 243021104441. The next prime is 243021104509. The reversal of 243021104505 is 505401120342.

243021104505 is a `hidden beast` number, since 2 + 4 + 30 + 21 + 104 + 505 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 60151977081 + 182869127424 = 245259^2 + 427632^2 .

It is not a de Polignac number, because 243021104505 - 2⁶ = 243021104441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243021104509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2700234450 + ... + 2700234539.

It is an arithmetic number, because the mean of its divisors is an integer number (35103048435).

Almost surely, 2^243021104505 is an apocalyptic number.

It is an amenable number.

243021104505 is a deficient number, since it is larger than the sum of its proper divisors (178215476715).

243021104505 is a wasteful number, since it uses less digits than its factorization.

243021104505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400469000 (or 5400468997 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 243021104505 its reverse (505401120342), we get a palindrome (748422224847).

The spelling of 243021104505 in words is "two hundred forty-three billion, twenty-one million, one hundred four thousand, five hundred five".