51547028 has 18 divisors (see below), whose sum is σ = 97681374. Its totient is φ = 23790624.

The previous prime is 51547003. The next prime is 51547051. The reversal of 51547028 is 82074515.

It can be written as a sum of positive squares in 3 ways, for example, as 595984 + 50951044 = 772^2 + 7138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51546985 and 51547003.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 37451 + ... + 38802.

It is an arithmetic number, because the mean of its divisors is an integer number (5426743).

Almost surely, 2^51547028 is an apocalyptic number.

It is an amenable number.

51547028 is a deficient number, since it is larger than the sum of its proper divisors (46134346).

51547028 is a wasteful number, since it uses less digits than its factorization.

51547028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76283 (or 76268 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 51547028 is about 7179.6258955464. The cubic root of 51547028 is about 372.1641565554.

The spelling of 51547028 in words is "fifty-one million, five hundred forty-seven thousand, twenty-eight".