51330132 has 96 divisors (see below), whose sum is σ = 155724800. Its totient is φ = 14315616.

The previous prime is 51330113. The next prime is 51330143. The reversal of 51330132 is 23103315.

51330132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51330132² = 5269564902274848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31719 + ... + 33297.

Almost surely, 2^51330132 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 51330132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77862400).

51330132 is an abundant number, since it is smaller than the sum of its proper divisors (104394668).

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

51330132 is a wasteful number, since it uses less digits than its factorization.

51330132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 51330132 is about 7164.5050073260. The cubic root of 51330132 is about 371.6414338902.

Adding to 51330132 its reverse (23103315), we get a palindrome (74433447).

The spelling of 51330132 in words is "fifty-one million, three hundred thirty thousand, one hundred thirty-two".