51531323 has 2 divisors, whose sum is σ = 51531324. Its totient is φ = 51531322.

The previous prime is 51531257. The next prime is 51531341. The reversal of 51531323 is 32313515.

51531323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51531323 - 2¹² = 51527227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51531353) 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 as a sum of consecutive naturals, namely, 25765661 + 25765662.

It is an arithmetic number, because the mean of its divisors is an integer number (25765662).

Almost surely, 2^51531323 is an apocalyptic number.

51531323 is a deficient number, since it is larger than the sum of its proper divisors (1).

51531323 is an equidigital number, since it uses as much as digits as its factorization.

51531323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 23.

The square root of 51531323 is about 7178.5320922874. The cubic root of 51531323 is about 372.1263565633.

Adding to 51531323 its reverse (32313515), we get a palindrome (83844838).

The spelling of 51531323 in words is "fifty-one million, five hundred thirty-one thousand, three hundred twenty-three".