51866147 has 2 divisors, whose sum is σ = 51866148. Its totient is φ = 51866146.

The previous prime is 51866083. The next prime is 51866149. The reversal of 51866147 is 74166815.

51866147 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 51866147 - 2⁶ = 51866083 is a prime.

Together with 51866149, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51866147.

It is not a weakly prime, because it can be changed into another prime (51866149) 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, 25933073 + 25933074.

It is an arithmetic number, because the mean of its divisors is an integer number (25933074).

Almost surely, 2^51866147 is an apocalyptic number.

51866147 is a deficient number, since it is larger than the sum of its proper divisors (1).

51866147 is an equidigital number, since it uses as much as digits as its factorization.

51866147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 51866147 is about 7201.8155349884. The cubic root of 51866147 is about 372.9305790731.

The spelling of 51866147 in words is "fifty-one million, eight hundred sixty-six thousand, one hundred forty-seven".