2011656 has 32 divisors (see below), whose sum is σ = 5097600. Its totient is φ = 661440.

The previous prime is 2011637. The next prime is 2011657. The reversal of 2011656 is 6561102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2011657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1366 + ... + 2426.

It is an arithmetic number, because the mean of its divisors is an integer number (159300).

2^2011656 is an apocalyptic number.

It is an amenable number.

2011656 is an abundant number, since it is smaller than the sum of its proper divisors (3085944).

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

2011656 is a wasteful number, since it uses less digits than its factorization.

2011656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2011656 is about 1418.3285938033. The cubic root of 2011656 is about 126.2363916973.

Adding to 2011656 its reverse (6561102), we get a palindrome (8572758).

The spelling of 2011656 in words is "two million, eleven thousand, six hundred fifty-six".