56636221 has 8 divisors (see below), whose sum is σ = 57169440. Its totient is φ = 56105712.

The previous prime is 56636201. The next prime is 56636249. The reversal of 56636221 is 12263665.

56636221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56636221 - 2¹⁵ = 56603453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56636201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76270 + ... + 77008.

It is an arithmetic number, because the mean of its divisors is an integer number (7146180).

Almost surely, 2^56636221 is an apocalyptic number.

It is an amenable number.

56636221 is a deficient number, since it is larger than the sum of its proper divisors (533219).

56636221 is a wasteful number, since it uses less digits than its factorization.

56636221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355.

The product of its digits is 12960, while the sum is 31.

The square root of 56636221 is about 7525.7040202230. The cubic root of 56636221 is about 384.0296494938.

Adding to 56636221 its reverse (12263665), we get a palindrome (68899886).

The spelling of 56636221 in words is "fifty-six million, six hundred thirty-six thousand, two hundred twenty-one".