5166112181 has 4 divisors (see below), whose sum is σ = 5166782892. Its totient is φ = 5165441472.

The previous prime is 5166112177. The next prime is 5166112183. The reversal of 5166112181 is 1812116615.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4825525156 + 340587025 = 69466^2 + 18455^2 .

It is a cyclic number.

It is not a de Polignac number, because 5166112181 - 2² = 5166112177 is a prime.

It is a super-2 number, since 2×5166112181² = 53377430133353153522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5166112183) 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, 323666 + ... + 339251.

It is an arithmetic number, because the mean of its divisors is an integer number (1291695723).

Almost surely, 2^5166112181 is an apocalyptic number.

It is an amenable number.

5166112181 is a deficient number, since it is larger than the sum of its proper divisors (670711).

5166112181 is an equidigital number, since it uses as much as digits as its factorization.

5166112181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670710.

The product of its digits is 2880, while the sum is 32.

The square root of 5166112181 is about 71875.6716907745. The cubic root of 5166112181 is about 1728.7065499712.

Adding to 5166112181 its reverse (1812116615), we get a palindrome (6978228796).

The spelling of 5166112181 in words is "five billion, one hundred sixty-six million, one hundred twelve thousand, one hundred eighty-one".