243216065 has 8 divisors (see below), whose sum is σ = 293169408. Its totient is φ = 193699440.

The previous prime is 243216037. The next prime is 243216067. The reversal of 243216065 is 560612342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243216065 - 2²⁶ = 176107201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243216067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107951 + ... + 110180.

It is an arithmetic number, because the mean of its divisors is an integer number (36646176).

Almost surely, 2^243216065 is an apocalyptic number.

It is an amenable number.

243216065 is a deficient number, since it is larger than the sum of its proper divisors (49953343).

243216065 is a wasteful number, since it uses less digits than its factorization.

243216065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218359.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 243216065 is about 15595.3860163832. The cubic root of 243216065 is about 624.2100441055.

The spelling of 243216065 in words is "two hundred forty-three million, two hundred sixteen thousand, sixty-five".