56477557 has 4 divisors (see below), whose sum is σ = 59450080. Its totient is φ = 53505036.

The previous prime is 56477527. The next prime is 56477591. The reversal of 56477557 is 75577465.

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 a de Polignac number, because none of the positive numbers 2^k-56477557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56477527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1486233 + ... + 1486270.

It is an arithmetic number, because the mean of its divisors is an integer number (14862520).

Almost surely, 2^56477557 is an apocalyptic number.

It is an amenable number.

56477557 is a deficient number, since it is larger than the sum of its proper divisors (2972523).

56477557 is a wasteful number, since it uses less digits than its factorization.

56477557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972522.

The product of its digits is 1029000, while the sum is 46.

The square root of 56477557 is about 7515.1551547523. The cubic root of 56477557 is about 383.6706997667.

The spelling of 56477557 in words is "fifty-six million, four hundred seventy-seven thousand, five hundred fifty-seven".