51787147 has 2 divisors, whose sum is σ = 51787148. Its totient is φ = 51787146.

The previous prime is 51787139. The next prime is 51787157. The reversal of 51787147 is 74178715.

51787147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51787147 - 2³ = 51787139 is a prime.

It is not a weakly prime, because it can be changed into another prime (51787157) 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, 25893573 + 25893574.

It is an arithmetic number, because the mean of its divisors is an integer number (25893574).

Almost surely, 2^51787147 is an apocalyptic number.

51787147 is a deficient number, since it is larger than the sum of its proper divisors (1).

51787147 is an equidigital number, since it uses as much as digits as its factorization.

51787147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54880, while the sum is 40.

The square root of 51787147 is about 7196.3287167833. The cubic root of 51787147 is about 372.7411396009.

The spelling of 51787147 in words is "fifty-one million, seven hundred eighty-seven thousand, one hundred forty-seven".