243144513 has 6 divisors (see below), whose sum is σ = 351208754. Its totient is φ = 162096336.

The previous prime is 243144509. The next prime is 243144533. The reversal of 243144513 is 315441342.

It is a happy number.

243144513 is a `hidden beast` number, since 2 + 4 + 3 + 144 + 513 = 666.

It can be written as a sum of positive squares in only one way, i.e., 154181889 + 88962624 = 12417^2 + 9432^2 .

It is not a de Polignac number, because 243144513 - 2² = 243144509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243144533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13508020 + ... + 13508037.

Almost surely, 2^243144513 is an apocalyptic number.

It is an amenable number.

243144513 is a deficient number, since it is larger than the sum of its proper divisors (108064241).

243144513 is a wasteful number, since it uses less digits than its factorization.

243144513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27016063 (or 27016060 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 243144513 is about 15593.0918358099. The cubic root of 243144513 is about 624.1488257567.

Adding to 243144513 its reverse (315441342), we get a palindrome (558585855).

The spelling of 243144513 in words is "two hundred forty-three million, one hundred forty-four thousand, five hundred thirteen".