2118155 has 8 divisors (see below), whose sum is σ = 2737392. Its totient is φ = 1564128.

The previous prime is 2118121. The next prime is 2118163. The reversal of 2118155 is 5518112.

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

It is a cyclic number.

It is not a de Polignac number, because 2118155 - 2⁶ = 2118091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2118155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16229 + ... + 16358.

It is an arithmetic number, because the mean of its divisors is an integer number (342174).

2^2118155 is an apocalyptic number.

2118155 is a deficient number, since it is larger than the sum of its proper divisors (619237).

2118155 is a wasteful number, since it uses less digits than its factorization.

2118155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32605.

The product of its digits is 400, while the sum is 23.

The square root of 2118155 is about 1455.3882643474. The cubic root of 2118155 is about 128.4258885180.

The spelling of 2118155 in words is "two million, one hundred eighteen thousand, one hundred fifty-five".