5418181 has 2 divisors, whose sum is σ = 5418182. Its totient is φ = 5418180.

The previous prime is 5418167. The next prime is 5418221. The reversal of 5418181 is 1818145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4661281 + 756900 = 2159^2 + 870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5418181 is a prime.

It is a super-2 number, since 2×5418181² = 58713370697522, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5413181) 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 as a sum of consecutive naturals, namely, 2709090 + 2709091.

It is an arithmetic number, because the mean of its divisors is an integer number (2709091).

Almost surely, 2^5418181 is an apocalyptic number.

It is an amenable number.

5418181 is a deficient number, since it is larger than the sum of its proper divisors (1).

5418181 is an equidigital number, since it uses as much as digits as its factorization.

5418181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 28.

The square root of 5418181 is about 2327.6986488805. The cubic root of 5418181 is about 175.6377384242.

The spelling of 5418181 in words is "five million, four hundred eighteen thousand, one hundred eighty-one".