51133232 has 40 divisors (see below), whose sum is σ = 105930720. Its totient is φ = 23851520.

The previous prime is 51133213. The next prime is 51133241. The reversal of 51133232 is 23233115.

It is a super-2 number, since 2×51133232² = 5229214829531648, which contains 22 as substring.

It is an unprimeable number.

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, 13394 + ... + 16782.

It is an arithmetic number, because the mean of its divisors is an integer number (2648268).

Almost surely, 2^51133232 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 51133232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52965360).

51133232 is an abundant number, since it is smaller than the sum of its proper divisors (54797488).

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

51133232 is a wasteful number, since it uses less digits than its factorization.

51133232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461 (or 3455 counting only the distinct ones).

The product of its digits is 540, while the sum is 20.

The square root of 51133232 is about 7150.7504501276. The cubic root of 51133232 is about 371.1656252230.

Adding to 51133232 its reverse (23233115), we get a palindrome (74366347).

The spelling of 51133232 in words is "fifty-one million, one hundred thirty-three thousand, two hundred thirty-two".