51450128 has 40 divisors (see below), whose sum is σ = 103093848. Its totient is φ = 24855552.

The previous prime is 51450083. The next prime is 51450131. The reversal of 51450128 is 82105415.

It can be written as a sum of positive squares in 4 ways, for example, as 11102224 + 40347904 = 3332^2 + 6352^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 51450097 and 51450106.

It is an unprimeable number.

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, 137750 + ... + 138122.

Almost surely, 2^51450128 is an apocalyptic number.

It is an amenable number.

51450128 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

51450128 is a wasteful number, since it uses less digits than its factorization.

51450128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 51450128 is about 7172.8744586811. The cubic root of 51450128 is about 371.9308076497.

The spelling of 51450128 in words is "fifty-one million, four hundred fifty thousand, one hundred twenty-eight".