56659191 has 4 divisors (see below), whose sum is σ = 75545592. Its totient is φ = 37772792.

The previous prime is 56659157. The next prime is 56659193. The reversal of 56659191 is 19195665.

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 56659191 - 2⁷ = 56659063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56659193) 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, 9443196 + ... + 9443201.

It is an arithmetic number, because the mean of its divisors is an integer number (18886398).

Almost surely, 2^56659191 is an apocalyptic number.

56659191 is a deficient number, since it is larger than the sum of its proper divisors (18886401).

56659191 is a wasteful number, since it uses less digits than its factorization.

56659191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18886400.

The product of its digits is 72900, while the sum is 42.

The square root of 56659191 is about 7527.2299685874. The cubic root of 56659191 is about 384.0815595531.

The spelling of 56659191 in words is "fifty-six million, six hundred fifty-nine thousand, one hundred ninety-one".