3220891 has 4 divisors (see below), whose sum is σ = 3269032. Its totient is φ = 3172752.

The previous prime is 3220883. The next prime is 3220901. The reversal of 3220891 is 1980223.

3220891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1980223 = 7 ⋅282889.

It is a cyclic number.

It is not a de Polignac number, because 3220891 - 2³ = 3220883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3220801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23970 + ... + 24103.

It is an arithmetic number, because the mean of its divisors is an integer number (817258).

Almost surely, 2^3220891 is an apocalyptic number.

3220891 is a deficient number, since it is larger than the sum of its proper divisors (48141).

3220891 is an equidigital number, since it uses as much as digits as its factorization.

3220891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48140.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 3220891 is about 1794.6840947643. The cubic root of 3220891 is about 147.6812442119.

The spelling of 3220891 in words is "three million, two hundred twenty thousand, eight hundred ninety-one".