51502528 has 84 divisors (see below), whose sum is σ = 129780792. Its totient is φ = 20052480.

The previous prime is 51502513. The next prime is 51502541. The reversal of 51502528 is 82520515.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 51502496 and 51502505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33750 + ... + 35242.

Almost surely, 2^51502528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51502528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64890396).

51502528 is an abundant number, since it is smaller than the sum of its proper divisors (78278264).

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

51502528 is a wasteful number, since it uses less digits than its factorization.

51502528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530 (or 1513 counting only the distinct ones).

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

The square root of 51502528 is about 7176.5261791482. The cubic root of 51502528 is about 372.0570306057.

The spelling of 51502528 in words is "fifty-one million, five hundred two thousand, five hundred twenty-eight".