3216863 has 4 divisors (see below), whose sum is σ = 3464328. Its totient is φ = 2969400.

The previous prime is 3216853. The next prime is 3216881. The reversal of 3216863 is 3686123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3216863 - 2⁶ = 3216799 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 (3216853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123713 + ... + 123738.

It is an arithmetic number, because the mean of its divisors is an integer number (866082).

Almost surely, 2^3216863 is an apocalyptic number.

3216863 is a deficient number, since it is larger than the sum of its proper divisors (247465).

3216863 is a wasteful number, since it uses less digits than its factorization.

3216863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247464.

The product of its digits is 5184, while the sum is 29.

The square root of 3216863 is about 1793.5615406225. The cubic root of 3216863 is about 147.6196558504.

The spelling of 3216863 in words is "three million, two hundred sixteen thousand, eight hundred sixty-three".