51323321 has 16 divisors (see below), whose sum is σ = 60960768. Its totient is φ = 42282000.

The previous prime is 51323309. The next prime is 51323347. The reversal of 51323321 is 12332315.

51323321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51323321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51323293 and 51323302.

It is not an unprimeable number, because it can be changed into a prime (51323521) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 34646 + ... + 36096.

It is an arithmetic number, because the mean of its divisors is an integer number (3810048).

Almost surely, 2^51323321 is an apocalyptic number.

It is an amenable number.

51323321 is a deficient number, since it is larger than the sum of its proper divisors (9637447).

51323321 is a wasteful number, since it uses less digits than its factorization.

51323321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652.

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

The square root of 51323321 is about 7164.0296621385. The cubic root of 51323321 is about 371.6249954509.

Adding to 51323321 its reverse (12332315), we get a palindrome (63655636).

The spelling of 51323321 in words is "fifty-one million, three hundred twenty-three thousand, three hundred twenty-one".