56808191 has 4 divisors (see below), whose sum is σ = 61972584. Its totient is φ = 51643800.

The previous prime is 56808173. The next prime is 56808197. The reversal of 56808191 is 19180865.

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 56808191 - 2⁶ = 56808127 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 (56808197) 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, 2582180 + ... + 2582201.

It is an arithmetic number, because the mean of its divisors is an integer number (15493146).

Almost surely, 2^56808191 is an apocalyptic number.

56808191 is a deficient number, since it is larger than the sum of its proper divisors (5164393).

56808191 is a wasteful number, since it uses less digits than its factorization.

56808191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164392.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 56808191 is about 7537.1208694036. The cubic root of 56808191 is about 384.4179454605.

The spelling of 56808191 in words is "fifty-six million, eight hundred eight thousand, one hundred ninety-one".