51384866 has 16 divisors (see below), whose sum is σ = 83160000. Its totient is φ = 23672208.

The previous prime is 51384859. The next prime is 51384869. The reversal of 51384866 is 66848315.

It is not an unprimeable number, because it can be changed into a prime (51384869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15635 + ... + 18633.

It is an arithmetic number, because the mean of its divisors is an integer number (5197500).

Almost surely, 2^51384866 is an apocalyptic number.

51384866 is a deficient number, since it is larger than the sum of its proper divisors (31775134).

51384866 is a wasteful number, since it uses less digits than its factorization.

51384866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673.

The product of its digits is 138240, while the sum is 41.

The square root of 51384866 is about 7168.3237929100. The cubic root of 51384866 is about 371.7734823616.

The spelling of 51384866 in words is "fifty-one million, three hundred eighty-four thousand, eight hundred sixty-six".