51431323 has 4 divisors (see below), whose sum is σ = 51903280. Its totient is φ = 50959368.

The previous prime is 51431293. The next prime is 51431327. The reversal of 51431323 is 32313415.

51431323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51431323 - 2⁹ = 51430811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51431294 and 51431303.

It is not an unprimeable number, because it can be changed into a prime (51431327) 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 3 ways as a sum of consecutive naturals, for example, 235815 + ... + 236032.

It is an arithmetic number, because the mean of its divisors is an integer number (12975820).

Almost surely, 2^51431323 is an apocalyptic number.

51431323 is a deficient number, since it is larger than the sum of its proper divisors (471957).

51431323 is a wasteful number, since it uses less digits than its factorization.

51431323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471956.

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

The square root of 51431323 is about 7171.5634975924. The cubic root of 51431323 is about 371.8854886103.

Adding to 51431323 its reverse (32313415), we get a palindrome (83744738).

The spelling of 51431323 in words is "fifty-one million, four hundred thirty-one thousand, three hundred twenty-three".