518343816 has 32 divisors (see below), whose sum is σ = 1320312960. Its totient is φ = 169520832.

The previous prime is 518343809. The next prime is 518343829. The reversal of 518343816 is 618343815.

It is a super-3 number, since 3×518343816³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202480 + ... + 205023.

It is an arithmetic number, because the mean of its divisors is an integer number (41259780).

Almost surely, 2^518343816 is an apocalyptic number.

It is an amenable number.

518343816 is an abundant number, since it is smaller than the sum of its proper divisors (801969144).

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

518343816 is a wasteful number, since it uses less digits than its factorization.

518343816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407565 (or 407561 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 518343816 is about 22767.1653044467. The cubic root of 518343816 is about 803.2905178920.

Subtracting 518343816 from its reverse (618343815), we obtain a palindrome (99999999).

The spelling of 518343816 in words is "five hundred eighteen million, three hundred forty-three thousand, eight hundred sixteen".