51757128 has 48 divisors (see below), whose sum is σ = 140575500. Its totient is φ = 17203200.

The previous prime is 51757127. The next prime is 51757133. The reversal of 51757128 is 82175715.

It can be written as a sum of positive squares in 2 ways, for example, as 43007364 + 8749764 = 6558^2 + 2958^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51757092 and 51757101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51757127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31528 + ... + 33128.

Almost surely, 2^51757128 is an apocalyptic number.

It is an amenable number.

51757128 is an abundant number, since it is smaller than the sum of its proper divisors (88818372).

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

51757128 is a wasteful number, since it uses less digits than its factorization.

51757128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062 (or 2055 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 51757128 is about 7194.2426981580. The cubic root of 51757128 is about 372.6691044878.

The spelling of 51757128 in words is "fifty-one million, seven hundred fifty-seven thousand, one hundred twenty-eight".