2116855 has 16 divisors (see below), whose sum is σ = 2832480. Its totient is φ = 1507968.

The previous prime is 2116837. The next prime is 2116867. The reversal of 2116855 is 5586112.

2116855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2116855 - 2¹¹ = 2114807 is a prime.

2116855 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1324 + ... + 2446.

It is an arithmetic number, because the mean of its divisors is an integer number (177030).

2^2116855 is an apocalyptic number.

2116855 is a deficient number, since it is larger than the sum of its proper divisors (715625).

2116855 is a wasteful number, since it uses less digits than its factorization.

2116855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170.

The product of its digits is 2400, while the sum is 28.

The square root of 2116855 is about 1454.9415795832. The cubic root of 2116855 is about 128.3996097011.

The spelling of 2116855 in words is "two million, one hundred sixteen thousand, eight hundred fifty-five".