56751993 has 12 divisors (see below), whose sum is σ = 86289840. Its totient is φ = 35843256.

The previous prime is 56751977. The next prime is 56752013. The reversal of 56751993 is 39915765.

It is not a de Polignac number, because 56751993 - 2⁴ = 56751977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56751953) 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 in 11 ways as a sum of consecutive naturals, for example, 165771 + ... + 166112.

It is an arithmetic number, because the mean of its divisors is an integer number (7190820).

Almost surely, 2^56751993 is an apocalyptic number.

It is an amenable number.

56751993 is a deficient number, since it is larger than the sum of its proper divisors (29537847).

56751993 is a wasteful number, since it uses less digits than its factorization.

56751993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331908 (or 331905 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 56751993 is about 7533.3918655543. The cubic root of 56751993 is about 384.2911406984.

The spelling of 56751993 in words is "fifty-six million, seven hundred fifty-one thousand, nine hundred ninety-three".