51324320 has 48 divisors (see below), whose sum is σ = 127643040. Its totient is φ = 19448064.

The previous prime is 51324311. The next prime is 51324323. The reversal of 51324320 is 2342315.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 51324292 and 51324301.

It is not an unprimeable number, because it can be changed into a prime (51324323) 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, 5402 + ... + 11481.

It is an arithmetic number, because the mean of its divisors is an integer number (2659230).

Almost surely, 2^51324320 is an apocalyptic number.

It is an amenable number.

51324320 is an abundant number, since it is smaller than the sum of its proper divisors (76318720).

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

51324320 is a wasteful number, since it uses less digits than its factorization.

51324320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16917 (or 16909 counting only the distinct ones).

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

The square root of 51324320 is about 7164.0993851286. The cubic root of 51324320 is about 371.6274066417.

Adding to 51324320 its reverse (2342315), we get a palindrome (53666635).

The spelling of 51324320 in words is "fifty-one million, three hundred twenty-four thousand, three hundred twenty".