56021321 has 8 divisors (see below), whose sum is σ = 57319680. Its totient is φ = 54727488.

The previous prime is 56021299. The next prime is 56021323. The reversal of 56021321 is 12312065.

56021321 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 56021321 - 2⁶ = 56021257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56021293 and 56021302.

It is not an unprimeable number, because it can be changed into a prime (56021323) 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, 42545 + ... + 43841.

It is an arithmetic number, because the mean of its divisors is an integer number (7164960).

Almost surely, 2^56021321 is an apocalyptic number.

It is an amenable number.

56021321 is a deficient number, since it is larger than the sum of its proper divisors (1298359).

56021321 is a wasteful number, since it uses less digits than its factorization.

56021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 56021321 is about 7484.7392072136. The cubic root of 56021321 is about 382.6347846863.

Adding to 56021321 its reverse (12312065), we get a palindrome (68333386).

The spelling of 56021321 in words is "fifty-six million, twenty-one thousand, three hundred twenty-one".