56411221 has 4 divisors (see below), whose sum is σ = 56484972. Its totient is φ = 56337472.

The previous prime is 56411213. The next prime is 56411263. The reversal of 56411221 is 12211465.

56411221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5574321 + 50836900 = 2361^2 + 7130^2 .

It is a cyclic number.

It is not a de Polignac number, because 56411221 - 2³ = 56411213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56411192 and 56411201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56411281) 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 3 ways as a sum of consecutive naturals, for example, 35716 + ... + 37261.

It is an arithmetic number, because the mean of its divisors is an integer number (14121243).

Almost surely, 2^56411221 is an apocalyptic number.

It is an amenable number.

56411221 is a deficient number, since it is larger than the sum of its proper divisors (73751).

56411221 is an equidigital number, since it uses as much as digits as its factorization.

56411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73750.

The product of its digits is 480, while the sum is 22.

The square root of 56411221 is about 7510.7403762878. The cubic root of 56411221 is about 383.5204267969.

Adding to 56411221 its reverse (12211465), we get a palindrome (68622686).

The spelling of 56411221 in words is "fifty-six million, four hundred eleven thousand, two hundred twenty-one".