51559984 has 40 divisors (see below), whose sum is σ = 115889408. Its totient is φ = 21764160.

The previous prime is 51559961. The next prime is 51560009. The reversal of 51559984 is 48995515.

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, 4069 + ... + 10939.

Almost surely, 2^51559984 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 51559984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57944704).

51559984 is an abundant number, since it is smaller than the sum of its proper divisors (64329424).

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

51559984 is a wasteful number, since it uses less digits than its factorization.

51559984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6953 (or 6947 counting only the distinct ones).

The product of its digits is 324000, while the sum is 46.

The square root of 51559984 is about 7180.5281142824. The cubic root of 51559984 is about 372.1953342656.

The spelling of 51559984 in words is "fifty-one million, five hundred fifty-nine thousand, nine hundred eighty-four".