56856287 has 2 divisors, whose sum is σ = 56856288. Its totient is φ = 56856286.

The previous prime is 56856257. The next prime is 56856311. The reversal of 56856287 is 78265865.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56856287 - 2¹⁰ = 56855263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56856257) 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 as a sum of consecutive naturals, namely, 28428143 + 28428144.

It is an arithmetic number, because the mean of its divisors is an integer number (28428144).

Almost surely, 2^56856287 is an apocalyptic number.

56856287 is a deficient number, since it is larger than the sum of its proper divisors (1).

56856287 is an equidigital number, since it uses as much as digits as its factorization.

56856287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 47.

The square root of 56856287 is about 7540.3108026128. The cubic root of 56856287 is about 384.5264025322.

The spelling of 56856287 in words is "fifty-six million, eight hundred fifty-six thousand, two hundred eighty-seven".