3221871 has 12 divisors (see below), whose sum is σ = 4452552. Its totient is φ = 2072224.

The previous prime is 3221819. The next prime is 3221899. The reversal of 3221871 is 1781223.

It is not a de Polignac number, because 3221871 - 2⁶ = 3221807 is a prime.

It is a super-3 number, since 3×3221871³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1885 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (371046).

Almost surely, 2^3221871 is an apocalyptic number.

3221871 is a deficient number, since it is larger than the sum of its proper divisors (1230681).

3221871 is a wasteful number, since it uses less digits than its factorization.

3221871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1309 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 3221871 is about 1794.9571025515. The cubic root of 3221871 is about 147.6962207038.

The spelling of 3221871 in words is "three million, two hundred twenty-one thousand, eight hundred seventy-one".