51655056 has 80 divisors (see below), whose sum is σ = 141419520. Its totient is φ = 16213120.

The previous prime is 51655013. The next prime is 51655067. The reversal of 51655056 is 65055615.

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, 78055 + ... + 78713.

It is an arithmetic number, because the mean of its divisors is an integer number (1767744).

Almost surely, 2^51655056 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 51655056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70709760).

51655056 is an abundant number, since it is smaller than the sum of its proper divisors (89764464).

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

51655056 is a wasteful number, since it uses less digits than its factorization.

51655056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 51655056 is about 7187.1451912425. The cubic root of 51655056 is about 372.4239587736.

The spelling of 51655056 in words is "fifty-one million, six hundred fifty-five thousand, fifty-six".