2191011 has 8 divisors (see below), whose sum is σ = 3093264. Its totient is φ = 1374720.

The previous prime is 2191001. The next prime is 2191019. The reversal of 2191011 is 1101912.

2191011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2191011 - 2⁹ = 2190499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2191019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21430 + ... + 21531.

It is an arithmetic number, because the mean of its divisors is an integer number (386658).

2^2191011 is an apocalyptic number.

2191011 is a deficient number, since it is larger than the sum of its proper divisors (902253).

2191011 is a wasteful number, since it uses less digits than its factorization.

2191011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42981.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 2191011 is about 1480.2064045261. The cubic root of 2191011 is about 129.8817662674.

Adding to 2191011 its reverse (1101912), we get a palindrome (3292923).

The spelling of 2191011 in words is "two million, one hundred ninety-one thousand, eleven".