3221999 has 4 divisors (see below), whose sum is σ = 3514920. Its totient is φ = 2929080.

The previous prime is 3221983. The next prime is 3222007. The reversal of 3221999 is 9991223.

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

It is not a de Polignac number, because 3221999 - 2⁴ = 3221983 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 (3221299) 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, 146444 + ... + 146465.

It is an arithmetic number, because the mean of its divisors is an integer number (878730).

Almost surely, 2^3221999 is an apocalyptic number.

3221999 is a deficient number, since it is larger than the sum of its proper divisors (292921).

3221999 is a wasteful number, since it uses less digits than its factorization.

3221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292920.

The product of its digits is 8748, while the sum is 35.

The square root of 3221999 is about 1794.9927576456. The cubic root of 3221999 is about 147.6981765928.

The spelling of 3221999 in words is "three million, two hundred twenty-one thousand, nine hundred ninety-nine".