51717328 has 20 divisors (see below), whose sum is σ = 107910628. Its totient is φ = 23869440.

The previous prime is 51717299. The next prime is 51717329. The reversal of 51717328 is 82371715.

It can be written as a sum of positive squares in 2 ways, for example, as 14653584 + 37063744 = 3828^2 + 6088^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51717293 and 51717302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51717329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124113 + ... + 124528.

Almost surely, 2^51717328 is an apocalyptic number.

It is an amenable number.

51717328 is an abundant number, since it is smaller than the sum of its proper divisors (56193300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51717328 is a wasteful number, since it uses less digits than its factorization.

51717328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248662 (or 248656 counting only the distinct ones).

The product of its digits is 11760, while the sum is 34.

The square root of 51717328 is about 7191.4760654542. The cubic root of 51717328 is about 372.5735554338.

The spelling of 51717328 in words is "fifty-one million, seven hundred seventeen thousand, three hundred twenty-eight".