2011191 has 32 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 1033344.

The previous prime is 2011183. The next prime is 2011193. The reversal of 2011191 is 1911102.

It is not a de Polignac number, because 2011191 - 2³ = 2011183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14400 + ... + 14538.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2^2011191 is an apocalyptic number.

2011191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2011191 is a deficient number, since it is larger than the sum of its proper divisors (1375689).

2011191 is a wasteful number, since it uses less digits than its factorization.

2011191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215.

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

The square root of 2011191 is about 1418.1646589871. The cubic root of 2011191 is about 126.2266643142.

Adding to 2011191 its reverse (1911102), we get a palindrome (3922293).

It can be divided in two parts, 20111 and 91, that added together give a palindrome (20202).

The spelling of 2011191 in words is "two million, eleven thousand, one hundred ninety-one".