2213656 has 8 divisors (see below), whose sum is σ = 4150620. Its totient is φ = 1106824.

The previous prime is 2213647. The next prime is 2213677. The reversal of 2213656 is 6563122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2213656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138346 + ... + 138361.

2^2213656 is an apocalyptic number.

It is an amenable number.

2213656 is a deficient number, since it is larger than the sum of its proper divisors (1936964).

2213656 is a wasteful number, since it uses less digits than its factorization.

2213656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276713 (or 276709 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 2213656 is about 1487.8360124691. The cubic root of 2213656 is about 130.3276939902.

Adding to 2213656 its reverse (6563122), we get a palindrome (8776778).

The spelling of 2213656 in words is "two million, two hundred thirteen thousand, six hundred fifty-six".