2162191 has 2 divisors, whose sum is σ = 2162192. Its totient is φ = 2162190.

The previous prime is 2162189. The next prime is 2162197. The reversal of 2162191 is 1912612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2162191 - 2¹ = 2162189 is a prime.

Together with 2162189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2162197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081095 + 1081096.

It is an arithmetic number, because the mean of its divisors is an integer number (1081096).

2^2162191 is an apocalyptic number.

2162191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2162191 is an equidigital number, since it uses as much as digits as its factorization.

2162191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 22.

The square root of 2162191 is about 1470.4390500799. The cubic root of 2162191 is about 129.3097737285.

It can be divided in two parts, 21621 and 91, that added together give a palindrome (21712).

The spelling of 2162191 in words is "two million, one hundred sixty-two thousand, one hundred ninety-one".