56313221 has 4 divisors (see below), whose sum is σ = 56628000. Its totient is φ = 55998444.

The previous prime is 56313203. The next prime is 56313227. The reversal of 56313221 is 12231365.

56313221 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56313221 - 2¹⁸ = 56051077 is a prime.

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 (56313227) 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, 157121 + ... + 157478.

It is an arithmetic number, because the mean of its divisors is an integer number (14157000).

Almost surely, 2^56313221 is an apocalyptic number.

It is an amenable number.

56313221 is a deficient number, since it is larger than the sum of its proper divisors (314779).

56313221 is a wasteful number, since it uses less digits than its factorization.

56313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314778.

The product of its digits is 1080, while the sum is 23.

The square root of 56313221 is about 7504.2135497332. The cubic root of 56313221 is about 383.2982086699.

Adding to 56313221 its reverse (12231365), we get a palindrome (68544586).

The spelling of 56313221 in words is "fifty-six million, three hundred thirteen thousand, two hundred twenty-one".