3221916 has 12 divisors (see below), whose sum is σ = 7517832. Its totient is φ = 1073968.

The previous prime is 3221899. The next prime is 3221917. The reversal of 3221916 is 6191223.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×3221916² = 20761485422112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134235 + ... + 134258.

It is an arithmetic number, because the mean of its divisors is an integer number (626486).

Almost surely, 2^3221916 is an apocalyptic number.

It is an amenable number.

3221916 is an abundant number, since it is smaller than the sum of its proper divisors (4295916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3221916 is a wasteful number, since it uses less digits than its factorization.

3221916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268500 (or 268498 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 3221916 is about 1794.9696376262. The cubic root of 3221916 is about 147.6969083269.

The spelling of 3221916 in words is "three million, two hundred twenty-one thousand, nine hundred sixteen".