243143545 has 8 divisors (see below), whose sum is σ = 293631624. Its totient is φ = 193275264.

The previous prime is 243143531. The next prime is 243143561. The reversal of 243143545 is 545341342.

It can be written as a sum of positive squares in 4 ways, for example, as 2676496 + 240467049 = 1636^2 + 15507^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 243143545 - 2¹³ = 243135353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 154084 + ... + 155653.

It is an arithmetic number, because the mean of its divisors is an integer number (36703953).

Almost surely, 2^243143545 is an apocalyptic number.

It is an amenable number.

243143545 is a deficient number, since it is larger than the sum of its proper divisors (50488079).

243143545 is a wasteful number, since it uses less digits than its factorization.

243143545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309899.

The product of its digits is 28800, while the sum is 31.

The square root of 243143545 is about 15593.0607963927. The cubic root of 243143545 is about 624.1479974745.

Adding to 243143545 its reverse (545341342), we get a palindrome (788484887).

The spelling of 243143545 in words is "two hundred forty-three million, one hundred forty-three thousand, five hundred forty-five".