2197559221 has 24 divisors (see below), whose sum is σ = 2638625760. Its totient is φ = 1813780800.

The previous prime is 2197559207. The next prime is 2197559227. The reversal of 2197559221 is 1229557912.

It is not a de Polignac number, because 2197559221 - 2³¹ = 50075573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197559227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103710 + ... + 123088.

It is an arithmetic number, because the mean of its divisors is an integer number (109942740).

Almost surely, 2^2197559221 is an apocalyptic number.

It is an amenable number.

2197559221 is a deficient number, since it is larger than the sum of its proper divisors (441066539).

2197559221 is a wasteful number, since it uses less digits than its factorization.

2197559221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19477 (or 19464 counting only the distinct ones).

The product of its digits is 113400, while the sum is 43.

The square root of 2197559221 is about 46878.1315860605. The cubic root of 2197559221 is about 1300.1102906428.

The spelling of 2197559221 in words is "two billion, one hundred ninety-seven million, five hundred fifty-nine thousand, two hundred twenty-one".