56777321 has 4 divisors (see below), whose sum is σ = 57191892. Its totient is φ = 56362752.

The previous prime is 56777311. The next prime is 56777327. The reversal of 56777321 is 12377765.

56777321 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 25361296 + 31416025 = 5036^2 + 5605^2 .

It is a cyclic number.

It is not a de Polignac number, because 56777321 - 2¹⁴ = 56760937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56777327) 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, 207080 + ... + 207353.

It is an arithmetic number, because the mean of its divisors is an integer number (14297973).

Almost surely, 2^56777321 is an apocalyptic number.

It is an amenable number.

56777321 is a deficient number, since it is larger than the sum of its proper divisors (414571).

56777321 is a wasteful number, since it uses less digits than its factorization.

56777321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414570.

The product of its digits is 61740, while the sum is 38.

The square root of 56777321 is about 7535.0727269218. The cubic root of 56777321 is about 384.3483009723.

The spelling of 56777321 in words is "fifty-six million, seven hundred seventy-seven thousand, three hundred twenty-one".