3221591 has 2 divisors, whose sum is σ = 3221592. Its totient is φ = 3221590.

The previous prime is 3221573. The next prime is 3221599. The reversal of 3221591 is 1951223.

It is a strong prime.

It is an emirp because it is prime and its reverse (1951223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3221591 - 2¹⁸ = 2959447 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3221599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610795 + 1610796.

It is an arithmetic number, because the mean of its divisors is an integer number (1610796).

Almost surely, 2^3221591 is an apocalyptic number.

3221591 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221591 is an equidigital number, since it uses as much as digits as its factorization.

3221591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 23.

The square root of 3221591 is about 1794.8791045639. The cubic root of 3221591 is about 147.6919420160.

The spelling of 3221591 in words is "three million, two hundred twenty-one thousand, five hundred ninety-one".