2162556 has 72 divisors (see below), whose sum is σ = 6150144. Its totient is φ = 635040.

The previous prime is 2162549. The next prime is 2162557. The reversal of 2162556 is 6552612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16965 + ... + 17091.

2^2162556 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 2162556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3075072).

2162556 is an abundant number, since it is smaller than the sum of its proper divisors (3987588).

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

2162556 is a wasteful number, since it uses less digits than its factorization.

2162556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 186 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2162556 is about 1470.5631574332. The cubic root of 2162556 is about 129.3170495907.

It can be divided in two parts, 216 and 2556, that added together give a palindrome (2772).

The spelling of 2162556 in words is "two million, one hundred sixty-two thousand, five hundred fifty-six".