2165156 has 24 divisors (see below), whose sum is σ = 4415040. Its totient is φ = 909792.

The previous prime is 2165147. The next prime is 2165159. The reversal of 2165156 is 6515612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165159) by changing a digit.

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, 755 + ... + 2213.

It is an arithmetic number, because the mean of its divisors is an integer number (183960).

2^2165156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2165156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207520).

2165156 is an abundant number, since it is smaller than the sum of its proper divisors (2249884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165156 is a wasteful number, since it uses less digits than its factorization.

2165156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523 (or 1521 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 2165156 is about 1471.4469069593. The cubic root of 2165156 is about 129.3688539792.

The spelling of 2165156 in words is "two million, one hundred sixty-five thousand, one hundred fifty-six".