243435545 has 4 divisors (see below), whose sum is σ = 292122660. Its totient is φ = 194748432.

The previous prime is 243435539. The next prime is 243435547. The reversal of 243435545 is 545534342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45104656 + 198330889 = 6716^2 + 14083^2 .

It is a cyclic number.

It is not a de Polignac number, because 243435545 - 2²² = 239241241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243435547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24343550 + ... + 24343559.

It is an arithmetic number, because the mean of its divisors is an integer number (73030665).

Almost surely, 2^243435545 is an apocalyptic number.

It is an amenable number.

243435545 is a deficient number, since it is larger than the sum of its proper divisors (48687115).

243435545 is an equidigital number, since it uses as much as digits as its factorization.

243435545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48687114.

The product of its digits is 144000, while the sum is 35.

The square root of 243435545 is about 15602.4211262227. The cubic root of 243435545 is about 624.3977515947.

Adding to 243435545 its reverse (545534342), we get a palindrome (788969887).

The spelling of 243435545 in words is "two hundred forty-three million, four hundred thirty-five thousand, five hundred forty-five".