5218865 has 4 divisors (see below), whose sum is σ = 6262644. Its totient is φ = 4175088.

The previous prime is 5218853. The next prime is 5218879. The reversal of 5218865 is 5688125.

It is a happy number.

5218865 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 1982464 + 3236401 = 1408^2 + 1799^2 .

It is a cyclic number.

It is not a de Polignac number, because 5218865 - 2¹⁰ = 5217841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 521882 + ... + 521891.

It is an arithmetic number, because the mean of its divisors is an integer number (1565661).

Almost surely, 2^5218865 is an apocalyptic number.

It is an amenable number.

5218865 is a deficient number, since it is larger than the sum of its proper divisors (1043779).

5218865 is a wasteful number, since it uses less digits than its factorization.

5218865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043778.

The product of its digits is 19200, while the sum is 35.

The square root of 5218865 is about 2284.4835302536. The cubic root of 5218865 is about 173.4570759226.

The spelling of 5218865 in words is "five million, two hundred eighteen thousand, eight hundred sixty-five".