56791571 has 4 divisors (see below), whose sum is σ = 57754200. Its totient is φ = 55828944.

The previous prime is 56791561. The next prime is 56791607. The reversal of 56791571 is 17519765.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17519765 = 5 ⋅3503953.

It is a cyclic number.

It is not a de Polignac number, because 56791571 - 2²² = 52597267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56791561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481226 + ... + 481343.

It is an arithmetic number, because the mean of its divisors is an integer number (14438550).

Almost surely, 2^56791571 is an apocalyptic number.

56791571 is a deficient number, since it is larger than the sum of its proper divisors (962629).

56791571 is an equidigital number, since it uses as much as digits as its factorization.

56791571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962628.

The product of its digits is 66150, while the sum is 41.

The square root of 56791571 is about 7536.0182457316. The cubic root of 56791571 is about 384.3804529246.

The spelling of 56791571 in words is "fifty-six million, seven hundred ninety-one thousand, five hundred seventy-one".