2201656 has 8 divisors (see below), whose sum is σ = 4128120. Its totient is φ = 1100824.

The previous prime is 2201627. The next prime is 2201669. The reversal of 2201656 is 6561022.

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

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, 137596 + ... + 137611.

It is an arithmetic number, because the mean of its divisors is an integer number (516015).

2^2201656 is an apocalyptic number.

It is an amenable number.

2201656 is a deficient number, since it is larger than the sum of its proper divisors (1926464).

2201656 is a wasteful number, since it uses less digits than its factorization.

2201656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275213 (or 275209 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2201656 is about 1483.7978298946. The cubic root of 2201656 is about 130.0917695224.

Adding to 2201656 its reverse (6561022), we get a palindrome (8762678).

The spelling of 2201656 in words is "two million, two hundred one thousand, six hundred fifty-six".