5187111813 has 12 divisors (see below), whose sum is σ = 8068840780. Its totient is φ = 3192068736.

The previous prime is 5187111799. The next prime is 5187111847. The reversal of 5187111813 is 3181117815.

It can be written as a sum of positive squares in 2 ways, for example, as 256544289 + 4930567524 = 16017^2 + 70218^2 .

It is not a de Polignac number, because 5187111813 - 2³⁰ = 4113369989 is a prime.

It is a super-2 number, since 2×5187111813² = 53812257921128293938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5187111863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22167028 + ... + 22167261.

Almost surely, 2^5187111813 is an apocalyptic number.

It is an amenable number.

5187111813 is a deficient number, since it is larger than the sum of its proper divisors (2881728967).

5187111813 is a wasteful number, since it uses less digits than its factorization.

5187111813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44334308 (or 44334305 counting only the distinct ones).

The product of its digits is 6720, while the sum is 36.

The square root of 5187111813 is about 72021.6065705285. The cubic root of 5187111813 is about 1731.0457122432.

The spelling of 5187111813 in words is "five billion, one hundred eighty-seven million, one hundred eleven thousand, eight hundred thirteen".