51327232 has 54 divisors (see below), whose sum is σ = 112682654. Its totient is φ = 23316480.

The previous prime is 51327229. The next prime is 51327257. The reversal of 51327232 is 23272315.

It can be written as a sum of positive squares in only one way, i.e., 40144896 + 11182336 = 6336^2 + 3344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51327197 and 51327206.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30148 + ... + 31804.

Almost surely, 2^51327232 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 51327232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56341327).

51327232 is an abundant number, since it is smaller than the sum of its proper divisors (61355422).

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

51327232 is a wasteful number, since it uses less digits than its factorization.

51327232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695 (or 1670 counting only the distinct ones).

The product of its digits is 2520, while the sum is 25.

The square root of 51327232 is about 7164.3026178408. The cubic root of 51327232 is about 371.6344348793.

Adding to 51327232 its reverse (23272315), we get a palindrome (74599547).

The spelling of 51327232 in words is "fifty-one million, three hundred twenty-seven thousand, two hundred thirty-two".