2163191 has 4 divisors (see below), whose sum is σ = 2180352. Its totient is φ = 2146032.

The previous prime is 2163181. The next prime is 2163193. The reversal of 2163191 is 1913612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2163191 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 (2163193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8390 + ... + 8643.

It is an arithmetic number, because the mean of its divisors is an integer number (545088).

2^2163191 is an apocalyptic number.

2163191 is a deficient number, since it is larger than the sum of its proper divisors (17161).

2163191 is a wasteful number, since it uses less digits than its factorization.

2163191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17160.

The product of its digits is 324, while the sum is 23.

The square root of 2163191 is about 1470.7790452682. The cubic root of 2163191 is about 129.3297056469.

The spelling of 2163191 in words is "two million, one hundred sixty-three thousand, one hundred ninety-one".