51432 has 16 divisors (see below), whose sum is σ = 128640. Its totient is φ = 17136.

The previous prime is 51431. The next prime is 51437. The reversal of 51432 is 23415.

It is a hoax number, since the sum of its digits (15) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 51432.

It is not an unprimeable number, because it can be changed into a prime (51431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048 + ... + 1095.

It is an arithmetic number, because the mean of its divisors is an integer number (8040).

2⁵¹⁴³² is an apocalyptic number.

It is an amenable number.

51432 is an abundant number, since it is smaller than the sum of its proper divisors (77208).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64320).

51432 is a wasteful number, since it uses less digits than its factorization.

51432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 2148 counting only the distinct ones).

The product of its digits is 120, while the sum is 15.

The square root of 51432 is about 226.7862429690. The cubic root of 51432 is about 37.1887120336.

Adding to 51432 its reverse (23415), we get a palindrome (74847).

The spelling of 51432 in words is "fifty-one thousand, four hundred thirty-two".