56207891 has 2 divisors, whose sum is σ = 56207892. Its totient is φ = 56207890.

The previous prime is 56207863. The next prime is 56207903. The reversal of 56207891 is 19870265.

56207891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56207891 - 2²² = 52013587 is a prime.

It is not a weakly prime, because it can be changed into another prime (56201891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28103945 + 28103946.

It is an arithmetic number, because the mean of its divisors is an integer number (28103946).

Almost surely, 2^56207891 is an apocalyptic number.

56207891 is a deficient number, since it is larger than the sum of its proper divisors (1).

56207891 is an equidigital number, since it uses as much as digits as its factorization.

56207891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 56207891 is about 7497.1922077535. The cubic root of 56207891 is about 383.0590818876.

The spelling of 56207891 in words is "fifty-six million, two hundred seven thousand, eight hundred ninety-one".