56558011 has 4 divisors (see below), whose sum is σ = 56593000. Its totient is φ = 56523024.

The previous prime is 56558009. The next prime is 56558023. The reversal of 56558011 is 11085565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11085565 = 5 ⋅2217113.

It is a cyclic number.

It is not a de Polignac number, because 56558011 - 2¹ = 56558009 is a prime.

It is a super-2 number, since 2×56558011² = 6397617216552242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56558111) 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, 14946 + ... + 18343.

It is an arithmetic number, because the mean of its divisors is an integer number (14148250).

Almost surely, 2^56558011 is an apocalyptic number.

56558011 is a deficient number, since it is larger than the sum of its proper divisors (34989).

56558011 is a wasteful number, since it uses less digits than its factorization.

56558011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34988.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 56558011 is about 7520.5060335060. The cubic root of 56558011 is about 383.8527968587.

The spelling of 56558011 in words is "fifty-six million, five hundred fifty-eight thousand, eleven".