56233021 has 4 divisors (see below), whose sum is σ = 60558652. Its totient is φ = 51907392.

The previous prime is 56232983. The next prime is 56233031. The reversal of 56233021 is 12033265.

56233021 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 15132100 + 41100921 = 3890^2 + 6411^2 .

It is a cyclic number.

It is not a de Polignac number, because 56233021 - 2⁷ = 56232893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56232983 and 56233001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56233031) 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, 2162796 + ... + 2162821.

It is an arithmetic number, because the mean of its divisors is an integer number (15139663).

Almost surely, 2^56233021 is an apocalyptic number.

It is an amenable number.

56233021 is a deficient number, since it is larger than the sum of its proper divisors (4325631).

56233021 is a wasteful number, since it uses less digits than its factorization.

56233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325630.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 56233021 is about 7498.8679812356. The cubic root of 56233021 is about 383.1161607088.

Adding to 56233021 its reverse (12033265), we get a palindrome (68266286).

The spelling of 56233021 in words is "fifty-six million, two hundred thirty-three thousand, twenty-one".