2111863 has 4 divisors (see below), whose sum is σ = 2274328. Its totient is φ = 1949400.

The previous prime is 2111861. The next prime is 2111873. The reversal of 2111863 is 3681112.

2111863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2111863 - 2¹ = 2111861 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 (2111861) 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 3 ways as a sum of consecutive naturals, for example, 81213 + ... + 81238.

It is an arithmetic number, because the mean of its divisors is an integer number (568582).

2^2111863 is an apocalyptic number.

2111863 is a deficient number, since it is larger than the sum of its proper divisors (162465).

2111863 is a wasteful number, since it uses less digits than its factorization.

2111863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162464.

The product of its digits is 288, while the sum is 22.

The square root of 2111863 is about 1453.2250341912. The cubic root of 2111863 is about 128.2985989466.

Adding to 2111863 its reverse (3681112), we get a palindrome (5792975).

The spelling of 2111863 in words is "two million, one hundred eleven thousand, eight hundred sixty-three".