56560221 has 16 divisors (see below), whose sum is σ = 84353920. Its totient is φ = 37454400.

The previous prime is 56560219. The next prime is 56560249. The reversal of 56560221 is 12206565.

56560221 is a `hidden beast` number, since 5 + 656 + 0 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 56560221 - 2¹ = 56560219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56560271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2860 + ... + 11013.

It is an arithmetic number, because the mean of its divisors is an integer number (5272120).

Almost surely, 2^56560221 is an apocalyptic number.

It is an amenable number.

56560221 is a deficient number, since it is larger than the sum of its proper divisors (27793699).

56560221 is a wasteful number, since it uses less digits than its factorization.

56560221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14033 (or 14027 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 56560221 is about 7520.6529636728. The cubic root of 56560221 is about 383.8577964665.

Adding to 56560221 its reverse (12206565), we get a palindrome (68766786).

The spelling of 56560221 in words is "fifty-six million, five hundred sixty thousand, two hundred twenty-one".