51143387 has 2 divisors, whose sum is σ = 51143388. Its totient is φ = 51143386.

The previous prime is 51143381. The next prime is 51143413. The reversal of 51143387 is 78334115.

51143387 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 a de Polignac number, because none of the positive numbers 2^k-51143387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51143381) 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, 25571693 + 25571694.

It is an arithmetic number, because the mean of its divisors is an integer number (25571694).

Almost surely, 2^51143387 is an apocalyptic number.

51143387 is a deficient number, since it is larger than the sum of its proper divisors (1).

51143387 is an equidigital number, since it uses as much as digits as its factorization.

51143387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 51143387 is about 7151.4604802096. The cubic root of 51143387 is about 371.1901946161.

The spelling of 51143387 in words is "fifty-one million, one hundred forty-three thousand, three hundred eighty-seven".