2206591 has 2 divisors, whose sum is σ = 2206592. Its totient is φ = 2206590.

The previous prime is 2206559. The next prime is 2206601. The reversal of 2206591 is 1956022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2206591 - 2⁵ = 2206559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2200591) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1103295 + 1103296.

It is an arithmetic number, because the mean of its divisors is an integer number (1103296).

2^2206591 is an apocalyptic number.

2206591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2206591 is an equidigital number, since it uses as much as digits as its factorization.

2206591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2206591 is about 1485.4598614571. The cubic root of 2206591 is about 130.1888969872.

The spelling of 2206591 in words is "two million, two hundred six thousand, five hundred ninety-one".