56505271 has 4 divisors (see below), whose sum is σ = 56537712. Its totient is φ = 56472832.

The previous prime is 56505269. The next prime is 56505277. The reversal of 56505271 is 17250565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17250565 = 5 ⋅3450113.

It is a cyclic number.

It is not a de Polignac number, because 56505271 - 2¹ = 56505269 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 (56505277) 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, 13450 + ... + 17143.

It is an arithmetic number, because the mean of its divisors is an integer number (14134428).

Almost surely, 2^56505271 is an apocalyptic number.

56505271 is a deficient number, since it is larger than the sum of its proper divisors (32441).

56505271 is a wasteful number, since it uses less digits than its factorization.

56505271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32440.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 56505271 is about 7516.9988027138. The cubic root of 56505271 is about 383.7334462898.

The spelling of 56505271 in words is "fifty-six million, five hundred five thousand, two hundred seventy-one".