243431545 has 8 divisors (see below), whose sum is σ = 333849024. Its totient is φ = 166924464.

The previous prime is 243431543. The next prime is 243431549. The reversal of 243431545 is 545134342.

243431545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 243431545 - 2¹ = 243431543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243431543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3477559 + ... + 3477628.

It is an arithmetic number, because the mean of its divisors is an integer number (41731128).

Almost surely, 2^243431545 is an apocalyptic number.

It is an amenable number.

243431545 is a deficient number, since it is larger than the sum of its proper divisors (90417479).

243431545 is an equidigital number, since it uses as much as digits as its factorization.

243431545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6955199.

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

The square root of 243431545 is about 15602.2929404623. The cubic root of 243431545 is about 624.3943316550.

Adding to 243431545 its reverse (545134342), we get a palindrome (788565887).

The spelling of 243431545 in words is "two hundred forty-three million, four hundred thirty-one thousand, five hundred forty-five".