243332665 has 4 divisors (see below), whose sum is σ = 291999204. Its totient is φ = 194666128.

The previous prime is 243332651. The next prime is 243332669. The reversal of 243332665 is 566233342.

243332665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96510976 + 146821689 = 9824^2 + 12117^2 .

It is a cyclic number.

It is not a de Polignac number, because 243332665 - 2⁵ = 243332633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243332665.

It is not an unprimeable number, because it can be changed into a prime (243332669) 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, 24333262 + ... + 24333271.

It is an arithmetic number, because the mean of its divisors is an integer number (72999801).

Almost surely, 2^243332665 is an apocalyptic number.

It is an amenable number.

243332665 is a deficient number, since it is larger than the sum of its proper divisors (48666539).

243332665 is an equidigital number, since it uses as much as digits as its factorization.

243332665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48666538.

The product of its digits is 77760, while the sum is 34.

The square root of 243332665 is about 15599.1238536015. The cubic root of 243332665 is about 624.3097788322.

The spelling of 243332665 in words is "two hundred forty-three million, three hundred thirty-two thousand, six hundred sixty-five".