2163155 has 4 divisors (see below), whose sum is σ = 2595792. Its totient is φ = 1730520.

The previous prime is 2163137. The next prime is 2163163. The reversal of 2163155 is 5513612.

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

It is not a de Polignac number, because 2163155 - 2⁸ = 2162899 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 2163155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216311 + ... + 216320.

It is an arithmetic number, because the mean of its divisors is an integer number (648948).

2^2163155 is an apocalyptic number.

2163155 is a deficient number, since it is larger than the sum of its proper divisors (432637).

2163155 is an equidigital number, since it uses as much as digits as its factorization.

2163155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432636.

The product of its digits is 900, while the sum is 23.

The square root of 2163155 is about 1470.7668068052. The cubic root of 2163155 is about 129.3289882044.

Adding to 2163155 its reverse (5513612), we get a palindrome (7676767).

The spelling of 2163155 in words is "two million, one hundred sixty-three thousand, one hundred fifty-five".