5218381 has 8 divisors (see below), whose sum is σ = 5978304. Its totient is φ = 4462080.

The previous prime is 5218361. The next prime is 5218391. The reversal of 5218381 is 1838125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5218381 - 2⁵ = 5218349 is a prime.

It is a super-2 number, since 2×5218381² = 54463000522322, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218321) 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 7 ways as a sum of consecutive naturals, for example, 3906 + ... + 5068.

It is an arithmetic number, because the mean of its divisors is an integer number (747288).

Almost surely, 2^5218381 is an apocalyptic number.

It is an amenable number.

5218381 is a deficient number, since it is larger than the sum of its proper divisors (759923).

5218381 is a wasteful number, since it uses less digits than its factorization.

5218381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811.

The product of its digits is 1920, while the sum is 28.

The square root of 5218381 is about 2284.3775957578. The cubic root of 5218381 is about 173.4517135931.

The spelling of 5218381 in words is "five million, two hundred eighteen thousand, three hundred eighty-one".