3220581 has 32 divisors (see below), whose sum is σ = 5419008. Its totient is φ = 1656000.

The previous prime is 3220579. The next prime is 3220597. The reversal of 3220581 is 1850223.

It is not a de Polignac number, because 3220581 - 2¹ = 3220579 is a prime.

It is a super-2 number, since 2×3220581² = 20744283955122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12706 + ... + 12956.

It is an arithmetic number, because the mean of its divisors is an integer number (169344).

Almost surely, 2^3220581 is an apocalyptic number.

It is an amenable number.

3220581 is a deficient number, since it is larger than the sum of its proper divisors (2198427).

3220581 is a wasteful number, since it uses less digits than its factorization.

3220581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 3220581 is about 1794.5977265114. The cubic root of 3220581 is about 147.6765061178.

The spelling of 3220581 in words is "three million, two hundred twenty thousand, five hundred eighty-one".