243441065321 has 16 divisors (see below), whose sum is σ = 253847193600. Its totient is φ = 233198740800.

The previous prime is 243441065317. The next prime is 243441065323. The reversal of 243441065321 is 123560144342.

It is a cyclic number.

It is not a de Polignac number, because 243441065321 - 2² = 243441065317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243441065323) 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 15 ways as a sum of consecutive naturals, for example, 3476111 + ... + 3545451.

It is an arithmetic number, because the mean of its divisors is an integer number (15865449600).

Almost surely, 2^243441065321 is an apocalyptic number.

It is an amenable number.

243441065321 is a deficient number, since it is larger than the sum of its proper divisors (10406128279).

243441065321 is a wasteful number, since it uses less digits than its factorization.

243441065321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70520.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 243441065321 in words is "two hundred forty-three billion, four hundred forty-one million, sixty-five thousand, three hundred twenty-one".