243145173 has 8 divisors (see below), whose sum is σ = 328297600. Its totient is φ = 160044768.

The previous prime is 243145157. The next prime is 243145181. The reversal of 243145173 is 371541342.

It is a happy number.

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

It is not a de Polignac number, because 243145173 - 2⁴ = 243145157 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 243145173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243145873) 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, 512728 + ... + 513201.

It is an arithmetic number, because the mean of its divisors is an integer number (41037200).

Almost surely, 2^243145173 is an apocalyptic number.

It is an amenable number.

243145173 is a deficient number, since it is larger than the sum of its proper divisors (85152427).

243145173 is a wasteful number, since it uses less digits than its factorization.

243145173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026011.

The product of its digits is 10080, while the sum is 30.

The square root of 243145173 is about 15593.1129990134. The cubic root of 243145173 is about 624.1493904934.

The spelling of 243145173 in words is "two hundred forty-three million, one hundred forty-five thousand, one hundred seventy-three".