243215012566723 has 4 divisors (see below), whose sum is σ = 243215414826688. Its totient is φ = 243214610306760.

The previous prime is 243215012566711. The next prime is 243215012566741. The reversal of 243215012566723 is 327665210512342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243215012566723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243215012566763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200221683 + ... + 201432748.

It is an arithmetic number, because the mean of its divisors is an integer number (60803853706672).

Almost surely, 2^{243215012566723} is an apocalyptic number.

243215012566723 is a deficient number, since it is larger than the sum of its proper divisors (402259965).

243215012566723 is an equidigital number, since it uses as much as digits as its factorization.

243215012566723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402259964.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 243215012566723 in words is "two hundred forty-three trillion, two hundred fifteen billion, twelve million, five hundred sixty-six thousand, seven hundred twenty-three".