5118181 has 4 divisors (see below), whose sum is σ = 5294700. Its totient is φ = 4941664.

The previous prime is 5118149. The next prime is 5118187. The reversal of 5118181 is 1818115.

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 1985281 + 3132900 = 1409^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 5118181 - 2⁵ = 5118149 is a prime.

It is a super-2 number, since 2×5118181² = 52391553497522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5118187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88216 + ... + 88273.

It is an arithmetic number, because the mean of its divisors is an integer number (1323675).

Almost surely, 2^5118181 is an apocalyptic number.

It is an amenable number.

5118181 is a deficient number, since it is larger than the sum of its proper divisors (176519).

5118181 is a wasteful number, since it uses less digits than its factorization.

5118181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176518.

The product of its digits is 320, while the sum is 25.

The square root of 5118181 is about 2262.3397180795. The cubic root of 5118181 is about 172.3343617604.

The spelling of 5118181 in words is "five million, one hundred eighteen thousand, one hundred eighty-one".