243242504505 has 144 divisors (see below), whose sum is σ = 576201173184. Its totient is φ = 93311688960.

The previous prime is 243242504459. The next prime is 243242504537. The reversal of 243242504505 is 505405242342.

It is not a de Polignac number, because 243242504505 - 2⁷ = 243242504377 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 243242504505.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 70399 + ... + 701028.

It is an arithmetic number, because the mean of its divisors is an integer number (4001397036).

Almost surely, 2^243242504505 is an apocalyptic number.

It is an amenable number.

243242504505 is an abundant number, since it is smaller than the sum of its proper divisors (332958668679).

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

243242504505 is a wasteful number, since it uses less digits than its factorization.

243242504505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771476 (or 771466 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 36.

Adding to 243242504505 its reverse (505405242342), we get a palindrome (748647746847).

It can be divided in two parts, 243242 and 504505, that added together give a palindrome (747747).

The spelling of 243242504505 in words is "two hundred forty-three billion, two hundred forty-two million, five hundred four thousand, five hundred five".