5218813 has 8 divisors (see below), whose sum is σ = 5675832. Its totient is φ = 4778496.

The previous prime is 5218793. The next prime is 5218817. The reversal of 5218813 is 3188125.

It can be written as a sum of positive squares in 4 ways, for example, as 4214809 + 1004004 = 2053^2 + 1002^2 .

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

It is not a de Polignac number, because 5218813 - 2¹⁷ = 5087741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3520 + ... + 4777.

It is an arithmetic number, because the mean of its divisors is an integer number (709479).

Almost surely, 2^5218813 is an apocalyptic number.

It is an amenable number.

5218813 is a deficient number, since it is larger than the sum of its proper divisors (457019).

5218813 is a wasteful number, since it uses less digits than its factorization.

5218813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8351.

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

The square root of 5218813 is about 2284.4721490970. The cubic root of 5218813 is about 173.4564998204.

The spelling of 5218813 in words is "five million, two hundred eighteen thousand, eight hundred thirteen".