2197591 has 12 divisors (see below), whose sum is σ = 2510280. Its totient is φ = 1905680.

The previous prime is 2197589. The next prime is 2197603. The reversal of 2197591 is 1957912.

It is not a de Polignac number, because 2197591 - 2¹ = 2197589 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 (2197501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26436 + ... + 26518.

It is an arithmetic number, because the mean of its divisors is an integer number (209190).

2^2197591 is an apocalyptic number.

2197591 is a deficient number, since it is larger than the sum of its proper divisors (312689).

2197591 is an equidigital number, since it uses as much as digits as its factorization.

2197591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 123 counting only the distinct ones).

The product of its digits is 5670, while the sum is 34.

The square root of 2197591 is about 1482.4274012578. The cubic root of 2197591 is about 130.0116557597.

The spelling of 2197591 in words is "two million, one hundred ninety-seven thousand, five hundred ninety-one".