243645159 has 4 divisors (see below), whose sum is σ = 324860216. Its totient is φ = 162430104.

The previous prime is 243645137. The next prime is 243645179. The reversal of 243645159 is 951546342.

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

It is not a de Polignac number, because 243645159 - 2¹² = 243641063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243645119) 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 3 ways as a sum of consecutive naturals, for example, 40607524 + ... + 40607529.

It is an arithmetic number, because the mean of its divisors is an integer number (81215054).

Almost surely, 2^243645159 is an apocalyptic number.

243645159 is a deficient number, since it is larger than the sum of its proper divisors (81215057).

243645159 is an equidigital number, since it uses as much as digits as its factorization.

243645159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81215056.

The product of its digits is 129600, while the sum is 39.

The square root of 243645159 is about 15609.1370357237. The cubic root of 243645159 is about 624.5769160112.

The spelling of 243645159 in words is "two hundred forty-three million, six hundred forty-five thousand, one hundred fifty-nine".