56187191 has 2 divisors, whose sum is σ = 56187192. Its totient is φ = 56187190.

The previous prime is 56187169. The next prime is 56187203. The reversal of 56187191 is 19178165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56187191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56187101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28093595 + 28093596.

It is an arithmetic number, because the mean of its divisors is an integer number (28093596).

Almost surely, 2^56187191 is an apocalyptic number.

56187191 is a deficient number, since it is larger than the sum of its proper divisors (1).

56187191 is an equidigital number, since it uses as much as digits as its factorization.

56187191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 38.

The square root of 56187191 is about 7495.8115638001. The cubic root of 56187191 is about 383.0120523309.

The spelling of 56187191 in words is "fifty-six million, one hundred eighty-seven thousand, one hundred ninety-one".