51536728 has 16 divisors (see below), whose sum is σ = 96799680. Its totient is φ = 25723488.

The previous prime is 51536711. The next prime is 51536729. The reversal of 51536728 is 82763515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51536729) 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 3 ways as a sum of consecutive naturals, for example, 451 + ... + 10162.

It is an arithmetic number, because the mean of its divisors is an integer number (6049980).

Almost surely, 2^51536728 is an apocalyptic number.

It is an amenable number.

51536728 is a deficient number, since it is larger than the sum of its proper divisors (45262952).

51536728 is a wasteful number, since it uses less digits than its factorization.

51536728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11226 (or 11222 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 51536728 is about 7178.9085521408. The cubic root of 51536728 is about 372.1393665963.

It can be divided in two parts, 5153 and 6728, that added together give a square (11881 = 109²).

The spelling of 51536728 in words is "fifty-one million, five hundred thirty-six thousand, seven hundred twenty-eight".