5518181519 has 4 divisors (see below), whose sum is σ = 5550078696. Its totient is φ = 5486284344.

The previous prime is 5518181507. The next prime is 5518181527. The reversal of 5518181519 is 9151818155.

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 5518181519 - 2⁴ = 5518181503 is a prime.

It is a super-2 number, since 2×5518181519² = 60900654553266294722, which contains 22 as substring.

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 5518181519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5518181819) 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, 15948329 + ... + 15948674.

It is an arithmetic number, because the mean of its divisors is an integer number (1387519674).

Almost surely, 2^5518181519 is an apocalyptic number.

5518181519 is a deficient number, since it is larger than the sum of its proper divisors (31897177).

5518181519 is a wasteful number, since it uses less digits than its factorization.

5518181519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31897176.

The product of its digits is 72000, while the sum is 44.

The square root of 5518181519 is about 74284.4635102119. The cubic root of 5518181519 is about 1767.1170918002.

The spelling of 5518181519 in words is "five billion, five hundred eighteen million, one hundred eighty-one thousand, five hundred nineteen".