51471647 has 2 divisors, whose sum is σ = 51471648. Its totient is φ = 51471646.

The previous prime is 51471619. The next prime is 51471649. The reversal of 51471647 is 74617415.

It is a happy number.

51471647 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 51471647 - 2⁶ = 51471583 is a prime.

Together with 51471649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51471649) 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, 25735823 + 25735824.

It is an arithmetic number, because the mean of its divisors is an integer number (25735824).

Almost surely, 2^51471647 is an apocalyptic number.

51471647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51471647 is an equidigital number, since it uses as much as digits as its factorization.

51471647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The square root of 51471647 is about 7174.3743281209. The cubic root of 51471647 is about 371.9826537370.

The spelling of 51471647 in words is "fifty-one million, four hundred seventy-one thousand, six hundred forty-seven".