243253165 has 16 divisors (see below), whose sum is σ = 298209600. Its totient is φ = 190429312.

The previous prime is 243253151. The next prime is 243253201. The reversal of 243253165 is 561352342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243253165 - 2¹¹ = 243251117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66966 + ... + 70504.

It is an arithmetic number, because the mean of its divisors is an integer number (18638100).

Almost surely, 2^243253165 is an apocalyptic number.

It is an amenable number.

243253165 is a deficient number, since it is larger than the sum of its proper divisors (54956435).

243253165 is a wasteful number, since it uses less digits than its factorization.

243253165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836.

The product of its digits is 21600, while the sum is 31.

The square root of 243253165 is about 15596.5754253939. The cubic root of 243253165 is about 624.2417813391.

The spelling of 243253165 in words is "two hundred forty-three million, two hundred fifty-three thousand, one hundred sixty-five".