243213569233636 has 9 divisors (see below), whose sum is σ = 425623800742441. Its totient is φ = 121606769021512.

The previous prime is 243213569233589. The next prime is 243213569233637. The reversal of 243213569233636 is 636332965312342.

The square root of 243213569233636 is 15595306.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 89581113972900 + 153632455260736 = 9464730^2 + 12394856^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243213569233637) 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 2 ways as a sum of consecutive naturals, for example, 27291786 + ... + 35089438.

Almost surely, 2^{243213569233636} is an apocalyptic number.

243213569233636 is the 15595306-th square number.

It is an amenable number.

243213569233636 is a deficient number, since it is larger than the sum of its proper divisors (182410231508805).

243213569233636 is an frugal number, since it uses more digits than its factorization.

243213569233636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15595310 (or 7797655 counting only the distinct ones).

The product of its digits is 75582720, while the sum is 58.

The spelling of 243213569233636 in words is "two hundred forty-three trillion, two hundred thirteen billion, five hundred sixty-nine million, two hundred thirty-three thousand, six hundred thirty-six".