5621656 has 8 divisors (see below), whose sum is σ = 10540620. Its totient is φ = 2810824.

The previous prime is 5621653. The next prime is 5621687. The reversal of 5621656 is 6561265.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351346 + ... + 351361.

Almost surely, 2^5621656 is an apocalyptic number.

It is an amenable number.

5621656 is a deficient number, since it is larger than the sum of its proper divisors (4918964).

5621656 is a wasteful number, since it uses less digits than its factorization.

5621656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702713 (or 702709 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 5621656 is about 2371.0031632202. The cubic root of 5621656 is about 177.8094160127.

It can be divided in two parts, 56 and 21656, that added together give a palindrome (21712).

The spelling of 5621656 in words is "five million, six hundred twenty-one thousand, six hundred fifty-six".