51568128 has 180 divisors, whose sum is σ = 162141408. Its totient is φ = 15759360.

The previous prime is 51568103. The next prime is 51568129. The reversal of 51568128 is 82186515.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51568092 and 51568101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51568129) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1663473 + ... + 1663503.

Almost surely, 2^51568128 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 51568128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81070704).

51568128 is an abundant number, since it is smaller than the sum of its proper divisors (110573280).

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

51568128 is a wasteful number, since it uses less digits than its factorization.

51568128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 55 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 51568128 is about 7181.0951810988. The cubic root of 51568128 is about 372.2149295602.

The spelling of 51568128 in words is "fifty-one million, five hundred sixty-eight thousand, one hundred twenty-eight".