56571011 has 4 divisors (see below), whose sum is σ = 64652592. Its totient is φ = 48489432.

The previous prime is 56570993. The next prime is 56571013. The reversal of 56571011 is 11017565.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56571011 - 2¹⁰ = 56569987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56571013) 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, 4040780 + ... + 4040793.

It is an arithmetic number, because the mean of its divisors is an integer number (16163148).

Almost surely, 2^56571011 is an apocalyptic number.

56571011 is a deficient number, since it is larger than the sum of its proper divisors (8081581).

56571011 is an equidigital number, since it uses as much as digits as its factorization.

56571011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081580.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 56571011 is about 7521.3702873878. The cubic root of 56571011 is about 383.8822044468.

Adding to 56571011 its reverse (11017565), we get a palindrome (67588576).

The spelling of 56571011 in words is "fifty-six million, five hundred seventy-one thousand, eleven".