243234752326523 has 64 divisors (see below), whose sum is σ = 264901935513600. Its totient is φ = 222607574784000.

The previous prime is 243234752326519. The next prime is 243234752326571. The reversal of 243234752326523 is 325623257432342.

It is a cyclic number.

It is not a de Polignac number, because 243234752326523 - 2² = 243234752326519 is a prime.

It is a super-2 number, since 2×243234752326523² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243234752326583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11377263848 + ... + 11377285226.

It is an arithmetic number, because the mean of its divisors is an integer number (4139092742400).

Almost surely, 2^{243234752326523} is an apocalyptic number.

243234752326523 is a deficient number, since it is larger than the sum of its proper divisors (21667183187077).

243234752326523 is a wasteful number, since it uses less digits than its factorization.

243234752326523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22152.

The product of its digits is 43545600, while the sum is 53.

The spelling of 243234752326523 in words is "two hundred forty-three trillion, two hundred thirty-four billion, seven hundred fifty-two million, three hundred twenty-six thousand, five hundred twenty-three".