56647571 has 4 divisors (see below), whose sum is σ = 58474944. Its totient is φ = 54820200.

The previous prime is 56647561. The next prime is 56647601. The reversal of 56647571 is 17574665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17574665 = 5 ⋅3514933.

It is a cyclic number.

It is not a de Polignac number, because 56647571 - 2¹⁴ = 56631187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56647561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913640 + ... + 913701.

It is an arithmetic number, because the mean of its divisors is an integer number (14618736).

Almost surely, 2^56647571 is an apocalyptic number.

56647571 is a deficient number, since it is larger than the sum of its proper divisors (1827373).

56647571 is a wasteful number, since it uses less digits than its factorization.

56647571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827372.

The product of its digits is 176400, while the sum is 41.

The square root of 56647571 is about 7526.4580647207. The cubic root of 56647571 is about 384.0553011899.

The spelling of 56647571 in words is "fifty-six million, six hundred forty-seven thousand, five hundred seventy-one".