51541728 has 72 divisors (see below), whose sum is σ = 157400712. Its totient is φ = 14724864.

The previous prime is 51541709. The next prime is 51541753. The reversal of 51541728 is 82714515.

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, 775 + ... + 10182.

It is an arithmetic number, because the mean of its divisors is an integer number (2186121).

Almost surely, 2^51541728 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 51541728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78700356).

51541728 is an abundant number, since it is smaller than the sum of its proper divisors (105858984).

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

51541728 is a wasteful number, since it uses less digits than its factorization.

51541728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10984 (or 10969 counting only the distinct ones).

The product of its digits is 11200, while the sum is 33.

The square root of 51541728 is about 7179.2567860469. The cubic root of 51541728 is about 372.1514009695.

The spelling of 51541728 in words is "fifty-one million, five hundred forty-one thousand, seven hundred twenty-eight".