51388147 has 2 divisors, whose sum is σ = 51388148. Its totient is φ = 51388146.

The previous prime is 51388121. The next prime is 51388151. The reversal of 51388147 is 74188315.

51388147 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 51388147 - 2⁷ = 51388019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51388247) 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, 25694073 + 25694074.

It is an arithmetic number, because the mean of its divisors is an integer number (25694074).

Almost surely, 2^51388147 is an apocalyptic number.

51388147 is a deficient number, since it is larger than the sum of its proper divisors (1).

51388147 is an equidigital number, since it uses as much as digits as its factorization.

51388147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 51388147 is about 7168.5526433165. The cubic root of 51388147 is about 371.7813949562.

The spelling of 51388147 in words is "fifty-one million, three hundred eighty-eight thousand, one hundred forty-seven".