5187111161 has 2 divisors, whose sum is σ = 5187111162. Its totient is φ = 5187111160.

The previous prime is 5187111157. The next prime is 5187111173. The reversal of 5187111161 is 1611117815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3017414761 + 2169696400 = 54931^2 + 46580^2 .

It is a cyclic number.

It is not a de Polignac number, because 5187111161 - 2² = 5187111157 is a prime.

It is a super-2 number, since 2×5187111161² = 53812244393141535842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5187111151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2593555580 + 2593555581.

It is an arithmetic number, because the mean of its divisors is an integer number (2593555581).

Almost surely, 2^5187111161 is an apocalyptic number.

It is an amenable number.

5187111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5187111161 is an equidigital number, since it uses as much as digits as its factorization.

5187111161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 32.

The square root of 5187111161 is about 72021.6020441090. The cubic root of 5187111161 is about 1731.0456397146.

Adding to 5187111161 its reverse (1611117815), we get a palindrome (6798228976).

The spelling of 5187111161 in words is "five billion, one hundred eighty-seven million, one hundred eleven thousand, one hundred sixty-one".