243513 has 16 divisors (see below), whose sum is σ = 374400. Its totient is φ = 156240.

The previous prime is 243487. The next prime is 243517. The reversal of 243513 is 315342.

It is not a de Polignac number, because 243513 - 2¹² = 239417 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243513.

It is not an unprimeable number, because it can be changed into a prime (243517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 628 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (23400).

2²⁴³⁵¹³ is an apocalyptic number.

It is an amenable number.

243513 is a deficient number, since it is larger than the sum of its proper divisors (130887).

243513 is a wasteful number, since it uses less digits than its factorization.

243513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 343 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 243513 is about 493.4703638518. The cubic root of 243513 is about 62.4463967068.

Adding to 243513 its reverse (315342), we get a palindrome (558855).

The spelling of 243513 in words is "two hundred forty-three thousand, five hundred thirteen".