56015887 has 2 divisors, whose sum is σ = 56015888. Its totient is φ = 56015886.

The previous prime is 56015837. The next prime is 56015899. The reversal of 56015887 is 78851065.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56015887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56015837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28007943 + 28007944.

It is an arithmetic number, because the mean of its divisors is an integer number (28007944).

Almost surely, 2^56015887 is an apocalyptic number.

56015887 is a deficient number, since it is larger than the sum of its proper divisors (1).

56015887 is an equidigital number, since it uses as much as digits as its factorization.

56015887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 56015887 is about 7484.3761931106. The cubic root of 56015887 is about 382.6224125833.

The spelling of 56015887 in words is "fifty-six million, fifteen thousand, eight hundred eighty-seven".