3216643 has 8 divisors (see below), whose sum is σ = 3430400. Its totient is φ = 3007368.

The previous prime is 3216637. The next prime is 3216649. The reversal of 3216643 is 3466123.

It is an interprime number because it is at equal distance from previous prime (3216637) and next prime (3216649).

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

It is a cyclic number.

It is not a de Polignac number, because 3216643 - 2⁵ = 3216611 is a prime.

It is the 1794-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3216649) by changing a digit.

It is a nontrivial repunit in base 1793.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430 + ... + 2572.

It is an arithmetic number, because the mean of its divisors is an integer number (428800).

Almost surely, 2^3216643 is an apocalyptic number.

3216643 is a deficient number, since it is larger than the sum of its proper divisors (213757).

3216643 is a wasteful number, since it uses less digits than its factorization.

3216643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241.

The product of its digits is 2592, while the sum is 25.

The square root of 3216643 is about 1793.5002090884. The cubic root of 3216643 is about 147.6162905568.

The spelling of 3216643 in words is "three million, two hundred sixteen thousand, six hundred forty-three".