3216681 has 24 divisors (see below), whose sum is σ = 5270720. Its totient is φ = 1874016.

The previous prime is 3216677. The next prime is 3216683. The reversal of 3216681 is 1866123.

It is not a de Polignac number, because 3216681 - 2² = 3216677 is a prime.

It is a super-2 number, since 2×3216681² = 20694073311522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3216683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1500 + ... + 2946.

Almost surely, 2^3216681 is an apocalyptic number.

It is an amenable number.

3216681 is a deficient number, since it is larger than the sum of its proper divisors (2054039).

3216681 is a wasteful number, since it uses less digits than its factorization.

3216681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485 (or 1482 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 3216681 is about 1793.5108028668. The cubic root of 3216681 is about 147.6168718458.

The spelling of 3216681 in words is "three million, two hundred sixteen thousand, six hundred eighty-one".