513643242 has 16 divisors (see below), whose sum is σ = 1174041792. Its totient is φ = 146755200.

The previous prime is 513643237. The next prime is 513643243. The reversal of 513643242 is 242346315.

It is not an unprimeable number, because it can be changed into a prime (513643243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6114759 + ... + 6114842.

It is an arithmetic number, because the mean of its divisors is an integer number (73377612).

Almost surely, 2^513643242 is an apocalyptic number.

513643242 is an abundant number, since it is smaller than the sum of its proper divisors (660398550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513643242 is a wasteful number, since it uses less digits than its factorization.

513643242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12229613.

The product of its digits is 17280, while the sum is 30.

The square root of 513643242 is about 22663.6987713833. The cubic root of 513643242 is about 800.8549412272.

Adding to 513643242 its reverse (242346315), we get a palindrome (755989557).

The spelling of 513643242 in words is "five hundred thirteen million, six hundred forty-three thousand, two hundred forty-two".