56221723 has 4 divisors (see below), whose sum is σ = 56599200. Its totient is φ = 55844248.

The previous prime is 56221721. The next prime is 56221727. The reversal of 56221723 is 32712265.

56221723 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 an emirpimes, since its reverse is a distinct semiprime: 32712265 = 5 ⋅6542453.

It is a cyclic number.

It is not a de Polignac number, because 56221723 - 2¹ = 56221721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56221691 and 56221700.

It is not an unprimeable number, because it can be changed into a prime (56221721) 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, 188515 + ... + 188812.

It is an arithmetic number, because the mean of its divisors is an integer number (14149800).

Almost surely, 2^56221723 is an apocalyptic number.

56221723 is a deficient number, since it is larger than the sum of its proper divisors (377477).

56221723 is a wasteful number, since it uses less digits than its factorization.

56221723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377476.

The product of its digits is 5040, while the sum is 28.

The square root of 56221723 is about 7498.1146296919. The cubic root of 56221723 is about 383.0905011928.

Adding to 56221723 its reverse (32712265), we get a palindrome (88933988).

The spelling of 56221723 in words is "fifty-six million, two hundred twenty-one thousand, seven hundred twenty-three".