51556328 has 8 divisors (see below), whose sum is σ = 96668130. Its totient is φ = 25778160.

The previous prime is 51556327. The next prime is 51556331. The reversal of 51556328 is 82365515.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 605284 = 7138^2 + 778^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51556327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222263 + ... + 3222278.

Almost surely, 2^51556328 is an apocalyptic number.

It is an amenable number.

51556328 is a deficient number, since it is larger than the sum of its proper divisors (45111802).

51556328 is a wasteful number, since it uses less digits than its factorization.

51556328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444547 (or 6444543 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 51556328 is about 7180.2735323942. The cubic root of 51556328 is about 372.1865368857.

The spelling of 51556328 in words is "fifty-one million, five hundred fifty-six thousand, three hundred twenty-eight".