51308447 has 2 divisors, whose sum is σ = 51308448. Its totient is φ = 51308446.

The previous prime is 51308419. The next prime is 51308459. The reversal of 51308447 is 74480315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51308447 - 2¹⁰ = 51307423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51308497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25654223 + 25654224.

It is an arithmetic number, because the mean of its divisors is an integer number (25654224).

Almost surely, 2^51308447 is an apocalyptic number.

51308447 is a deficient number, since it is larger than the sum of its proper divisors (1).

51308447 is an equidigital number, since it uses as much as digits as its factorization.

51308447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 51308447 is about 7162.9914840100. The cubic root of 51308447 is about 371.5890917971.

The spelling of 51308447 in words is "fifty-one million, three hundred eight thousand, four hundred forty-seven".