56751091 has 2 divisors, whose sum is σ = 56751092. Its totient is φ = 56751090.

The previous prime is 56751089. The next prime is 56751113. The reversal of 56751091 is 19015765.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56751091 - 2¹ = 56751089 is a prime.

Together with 56751089, it forms a pair of twin primes.

It is equal to p_3380497 and since 56751091 and 3380497 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56751031) 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, 28375545 + 28375546.

It is an arithmetic number, because the mean of its divisors is an integer number (28375546).

Almost surely, 2^56751091 is an apocalyptic number.

56751091 is a deficient number, since it is larger than the sum of its proper divisors (1).

56751091 is an equidigital number, since it uses as much as digits as its factorization.

56751091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 56751091 is about 7533.3319985250. The cubic root of 56751091 is about 384.2891047496.

The spelling of 56751091 in words is "fifty-six million, seven hundred fifty-one thousand, ninety-one".