51356928 has 144 divisors (see below), whose sum is σ = 160707456. Its totient is φ = 14254080.

The previous prime is 51356923. The next prime is 51356951. The reversal of 51356928 is 82965315.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

Its product of digits (64800) is a multiple of the sum of its prime factors (300).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51356923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220300 + ... + 220532.

It is an arithmetic number, because the mean of its divisors is an integer number (1116024).

Almost surely, 2^51356928 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 51356928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80353728).

51356928 is an abundant number, since it is smaller than the sum of its proper divisors (109350528).

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

51356928 is a wasteful number, since it uses less digits than its factorization.

51356928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 286 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 51356928 is about 7166.3748157628. The cubic root of 51356928 is about 371.7060922827.

The spelling of 51356928 in words is "fifty-one million, three hundred fifty-six thousand, nine hundred twenty-eight".