56388257 has 4 divisors (see below), whose sum is σ = 59356080. Its totient is φ = 53420436.

The previous prime is 56388253. The next prime is 56388281. The reversal of 56388257 is 75288365.

56388257 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 56388257 - 2² = 56388253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56388253) 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, 1483883 + ... + 1483920.

It is an arithmetic number, because the mean of its divisors is an integer number (14839020).

Almost surely, 2^56388257 is an apocalyptic number.

It is an amenable number.

56388257 is a deficient number, since it is larger than the sum of its proper divisors (2967823).

56388257 is a wasteful number, since it uses less digits than its factorization.

56388257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967822.

The product of its digits is 403200, while the sum is 44.

The square root of 56388257 is about 7509.2114765799. The cubic root of 56388257 is about 383.4683782962.

The spelling of 56388257 in words is "fifty-six million, three hundred eighty-eight thousand, two hundred fifty-seven".