56128187 has 2 divisors, whose sum is σ = 56128188. Its totient is φ = 56128186.

The previous prime is 56128183. The next prime is 56128207. The reversal of 56128187 is 78182165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56128187 - 2² = 56128183 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56128187.

It is not a weakly prime, because it can be changed into another prime (56128183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28064093 + 28064094.

It is an arithmetic number, because the mean of its divisors is an integer number (28064094).

Almost surely, 2^56128187 is an apocalyptic number.

56128187 is a deficient number, since it is larger than the sum of its proper divisors (1).

56128187 is an equidigital number, since it uses as much as digits as its factorization.

56128187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 38.

The square root of 56128187 is about 7491.8747320013. The cubic root of 56128187 is about 382.8779342274.

The spelling of 56128187 in words is "fifty-six million, one hundred twenty-eight thousand, one hundred eighty-seven".