513531243 has 12 divisors (see below), whose sum is σ = 741981240. Its totient is φ = 342255456.

The previous prime is 513531203. The next prime is 513531247. The reversal of 513531243 is 342135315.

It is not a de Polignac number, because 513531243 - 2⁸ = 513530987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513531247) 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, 38980 + ... + 50462.

It is an arithmetic number, because the mean of its divisors is an integer number (61831770).

Almost surely, 2^513531243 is an apocalyptic number.

513531243 is a deficient number, since it is larger than the sum of its proper divisors (228449997).

513531243 is a wasteful number, since it uses less digits than its factorization.

513531243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16458 (or 16455 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 513531243 is about 22661.2277469691. The cubic root of 513531243 is about 800.7967286617.

Adding to 513531243 its reverse (342135315), we get a palindrome (855666558).

The spelling of 513531243 in words is "five hundred thirteen million, five hundred thirty-one thousand, two hundred forty-three".