51009768 has 48 divisors (see below), whose sum is σ = 144162720. Its totient is φ = 16263456.

The previous prime is 51009731. The next prime is 51009769. The reversal of 51009768 is 86790015.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51009769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13746 + ... + 17057.

It is an arithmetic number, because the mean of its divisors is an integer number (3003390).

Almost surely, 2^51009768 is an apocalyptic number.

It is an amenable number.

51009768 is an abundant number, since it is smaller than the sum of its proper divisors (93152952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51009768 is a wasteful number, since it uses less digits than its factorization.

51009768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30838 (or 30831 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 51009768 is about 7142.1122925924. The cubic root of 51009768 is about 370.8666511943.

The spelling of 51009768 in words is "fifty-one million, nine thousand, seven hundred sixty-eight".