51321628 has 12 divisors (see below), whose sum is σ = 91043680. Its totient is φ = 25309152.

The previous prime is 51321607. The next prime is 51321629. The reversal of 51321628 is 82612315.

51321628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51321596 and 51321605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321629) 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 in 3 ways as a sum of consecutive naturals, for example, 87588 + ... + 88171.

Almost surely, 2^51321628 is an apocalyptic number.

It is an amenable number.

51321628 is a deficient number, since it is larger than the sum of its proper divisors (39722052).

51321628 is a wasteful number, since it uses less digits than its factorization.

51321628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175836 (or 175834 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 51321628 is about 7163.9115014076. The cubic root of 51321628 is about 371.6209091472.

The spelling of 51321628 in words is "fifty-one million, three hundred twenty-one thousand, six hundred twenty-eight".