51321433 has 8 divisors (see below), whose sum is σ = 52221960. Its totient is φ = 50428800.

The previous prime is 51321421. The next prime is 51321449. The reversal of 51321433 is 33412315.

51321433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16711744 + 34609689 = 4088^2 + 5883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51321433 - 2⁵ = 51321401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51321733) 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 7 ways as a sum of consecutive naturals, for example, 11983 + ... + 15691.

It is an arithmetic number, because the mean of its divisors is an integer number (6527745).

Almost surely, 2^51321433 is an apocalyptic number.

It is an amenable number.

51321433 is a deficient number, since it is larger than the sum of its proper divisors (900527).

51321433 is a wasteful number, since it uses less digits than its factorization.

51321433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947.

The product of its digits is 1080, while the sum is 22.

The square root of 51321433 is about 7163.8978915113. The cubic root of 51321433 is about 371.6204384803.

Adding to 51321433 its reverse (33412315), we get a palindrome (84733748).

The spelling of 51321433 in words is "fifty-one million, three hundred twenty-one thousand, four hundred thirty-three".