51565632 has 56 divisors (see below), whose sum is σ = 142378176. Its totient is φ = 16439808.

The previous prime is 51565597. The next prime is 51565649. The reversal of 51565632 is 23656515.

It is a junction number, because it is equal to n+sod(n) for n = 51565593 and 51565602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1423 + ... + 10254.

Almost surely, 2^51565632 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 51565632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71189088).

51565632 is an abundant number, since it is smaller than the sum of its proper divisors (90812544).

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

51565632 is a wasteful number, since it uses less digits than its factorization.

51565632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11715 (or 11705 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 51565632 is about 7180.9213893483. The cubic root of 51565632 is about 372.2089241489.

The spelling of 51565632 in words is "fifty-one million, five hundred sixty-five thousand, six hundred thirty-two".