2197271691 has 10 divisors (see below), whose sum is σ = 3282344252. Its totient is φ = 1464847740.

The previous prime is 2197271689. The next prime is 2197271707. The reversal of 2197271691 is 1961727912.

It is not a de Polignac number, because 2197271691 - 2¹ = 2197271689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2197272691) 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 9 ways as a sum of consecutive naturals, for example, 13563325 + ... + 13563486.

Almost surely, 2^2197271691 is an apocalyptic number.

2197271691 is a deficient number, since it is larger than the sum of its proper divisors (1085072561).

2197271691 is an equidigital number, since it uses as much as digits as its factorization.

2197271691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27126823 (or 27126814 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 2197271691 is about 46875.0647039553. The cubic root of 2197271691 is about 1300.0535857596.

The spelling of 2197271691 in words is "two billion, one hundred ninety-seven million, two hundred seventy-one thousand, six hundred ninety-one".