518111011 has 4 divisors (see below), whose sum is σ = 565212024. Its totient is φ = 471010000.

The previous prime is 518110991. The next prime is 518111017. The reversal of 518111011 is 110111815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 518111011 - 2⁵ = 518110979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 518111011.

It is not an unprimeable number, because it can be changed into a prime (518111017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23550490 + ... + 23550511.

It is an arithmetic number, because the mean of its divisors is an integer number (141303006).

Almost surely, 2^518111011 is an apocalyptic number.

518111011 is a deficient number, since it is larger than the sum of its proper divisors (47101013).

518111011 is a wasteful number, since it uses less digits than its factorization.

518111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47101012.

The product of its (nonzero) digits is 40, while the sum is 19.

The square root of 518111011 is about 22762.0519944929. The cubic root of 518111011 is about 803.1702386181.

Adding to 518111011 its reverse (110111815), we get a palindrome (628222826).

The spelling of 518111011 in words is "five hundred eighteen million, one hundred eleven thousand, eleven".