243512145 has 12 divisors (see below), whose sum is σ = 422087796. Its totient is φ = 129873120.

The previous prime is 243512141. The next prime is 243512147. The reversal of 243512145 is 541215342.

243512145 is a `hidden beast` number, since 2 + 4 + 3 + 512 + 145 = 666.

243512145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 156575169 + 86936976 = 12513^2 + 9324^2 .

It is not a de Polignac number, because 243512145 - 2² = 243512141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243512141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2705646 + ... + 2705735.

It is an arithmetic number, because the mean of its divisors is an integer number (35173983).

Almost surely, 2^243512145 is an apocalyptic number.

It is an amenable number.

243512145 is a deficient number, since it is larger than the sum of its proper divisors (178575651).

243512145 is a wasteful number, since it uses less digits than its factorization.

243512145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411392 (or 5411389 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 243512145 is about 15604.8756803763. The cubic root of 243512145 is about 624.4632362141.

Adding to 243512145 its reverse (541215342), we get a palindrome (784727487).

The spelling of 243512145 in words is "two hundred forty-three million, five hundred twelve thousand, one hundred forty-five".