51533232 has 40 divisors (see below), whose sum is σ = 137721840. Its totient is φ = 16584960.

The previous prime is 51533231. The next prime is 51533243. The reversal of 51533232 is 23233515.

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 (51533231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17119 + ... + 19902.

It is an arithmetic number, because the mean of its divisors is an integer number (3443046).

Almost surely, 2^51533232 is an apocalyptic number.

It is an amenable number.

51533232 is an abundant number, since it is smaller than the sum of its proper divisors (86188608).

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

51533232 is a wasteful number, since it uses less digits than its factorization.

51533232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37061 (or 37055 counting only the distinct ones).

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

The square root of 51533232 is about 7178.6650569587. The cubic root of 51533232 is about 372.1309517001.

Adding to 51533232 its reverse (23233515), we get a palindrome (74766747).

It can be divided in two parts, 5153 and 3232, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 51533232 in words is "fifty-one million, five hundred thirty-three thousand, two hundred thirty-two".