2156616 has 96 divisors (see below), whose sum is σ = 7300800. Its totient is φ = 558720.

The previous prime is 2156599. The next prime is 2156617. The reversal of 2156616 is 6166512.

It is a happy number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156616.

It is not an unprimeable number, because it can be changed into a prime (2156617) 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 23 ways as a sum of consecutive naturals, for example, 5350 + ... + 5738.

It is an arithmetic number, because the mean of its divisors is an integer number (76050).

2^2156616 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 2156616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3650400).

2156616 is an abundant number, since it is smaller than the sum of its proper divisors (5144184).

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

2156616 is a wasteful number, since it uses less digits than its factorization.

2156616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 412 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 2156616 is about 1468.5421342270. The cubic root of 2156616 is about 129.1985404980.

It can be divided in two parts, 2156 and 616, that added together give a palindrome (2772).

The spelling of 2156616 in words is "two million, one hundred fifty-six thousand, six hundred sixteen".