516815394 has 16 divisors (see below), whose sum is σ = 1036239168. Its totient is φ = 171837072.

The previous prime is 516815347. The next prime is 516815413. The reversal of 516815394 is 493518615.

It is an unprimeable number.

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, 106102 + ... + 110865.

It is an arithmetic number, because the mean of its divisors is an integer number (64764948).

Almost surely, 2^516815394 is an apocalyptic number.

516815394 is an abundant number, since it is smaller than the sum of its proper divisors (519423774).

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

516815394 is a wasteful number, since it uses less digits than its factorization.

516815394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217369.

The product of its digits is 129600, while the sum is 42.

The square root of 516815394 is about 22733.5741580597. The cubic root of 516815394 is about 802.5001958443.

It can be divided in two parts, 51681 and 5394, that added together give a palindrome (57075).

The spelling of 516815394 in words is "five hundred sixteen million, eight hundred fifteen thousand, three hundred ninety-four".