51335232 has 112 divisors (see below), whose sum is σ = 148327872. Its totient is φ = 15575040.

The previous prime is 51335203. The next prime is 51335237. The reversal of 51335232 is 23253315.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (51335237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326898 + ... + 327054.

It is an arithmetic number, because the mean of its divisors is an integer number (1324356).

Almost surely, 2^51335232 is an apocalyptic number.

51335232 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51335232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74163936).

51335232 is an abundant number, since it is smaller than the sum of its proper divisors (96992640).

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

51335232 is a wasteful number, since it uses less digits than its factorization.

51335232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 306 counting only the distinct ones).

The product of its digits is 2700, while the sum is 24.

The square root of 51335232 is about 7164.8609197946. The cubic root of 51335232 is about 371.6537418561.

Adding to 51335232 its reverse (23253315), we get a palindrome (74588547).

The spelling of 51335232 in words is "fifty-one million, three hundred thirty-five thousand, two hundred thirty-two".