51528864 has 96 divisors (see below), whose sum is σ = 141341760. Its totient is φ = 16422912.

The previous prime is 51528859. The next prime is 51528899. The reversal of 51528864 is 46882515.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316047 + ... + 316209.

It is an arithmetic number, because the mean of its divisors is an integer number (1472310).

Almost surely, 2^51528864 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 51528864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70670880).

51528864 is an abundant number, since it is smaller than the sum of its proper divisors (89812896).

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

51528864 is a wasteful number, since it uses less digits than its factorization.

51528864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 294 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 51528864 is about 7178.3608156737. The cubic root of 51528864 is about 372.1204373591.

The spelling of 51528864 in words is "fifty-one million, five hundred twenty-eight thousand, eight hundred sixty-four".