51330224 has 20 divisors (see below), whose sum is σ = 108493800. Its totient is φ = 23331840.

The previous prime is 51330199. The next prime is 51330247. The reversal of 51330224 is 42203315.

It is a happy number.

51330224 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-3 number, since 3×51330224³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51330196 and 51330205.

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 3 ways as a sum of consecutive naturals, for example, 145649 + ... + 146000.

It is an arithmetic number, because the mean of its divisors is an integer number (5424690).

Almost surely, 2^51330224 is an apocalyptic number.

It is an amenable number.

51330224 is an abundant number, since it is smaller than the sum of its proper divisors (57163576).

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

51330224 is a wasteful number, since it uses less digits than its factorization.

51330224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291668 (or 291662 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 51330224 is about 7164.5114278644. The cubic root of 51330224 is about 371.6416559234.

Adding to 51330224 its reverse (42203315), we get a palindrome (93533539).

The spelling of 51330224 in words is "fifty-one million, three hundred thirty thousand, two hundred twenty-four".