51528520 has 16 divisors (see below), whose sum is σ = 115939260. Its totient is φ = 20611392.

The previous prime is 51528511. The next prime is 51528523. The reversal of 51528520 is 2582515.

It can be written as a sum of positive squares in 2 ways, for example, as 44009956 + 7518564 = 6634^2 + 2742^2 .

It is not an unprimeable number, because it can be changed into a prime (51528523) 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, 644067 + ... + 644146.

Almost surely, 2^51528520 is an apocalyptic number.

It is an amenable number.

51528520 is an abundant number, since it is smaller than the sum of its proper divisors (64410740).

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

51528520 is a wasteful number, since it uses less digits than its factorization.

51528520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288224 (or 1288220 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 51528520 is about 7178.3368547317. The cubic root of 51528520 is about 372.1196092813.

The spelling of 51528520 in words is "fifty-one million, five hundred twenty-eight thousand, five hundred twenty".