51143291 has 2 divisors, whose sum is σ = 51143292. Its totient is φ = 51143290.

The previous prime is 51143233. The next prime is 51143353. The reversal of 51143291 is 19234115.

51143291 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-51143291 is a prime.

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 51143291.

It is not a weakly prime, because it can be changed into another prime (51143201) 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, 25571645 + 25571646.

It is an arithmetic number, because the mean of its divisors is an integer number (25571646).

Almost surely, 2^51143291 is an apocalyptic number.

51143291 is a deficient number, since it is larger than the sum of its proper divisors (1).

51143291 is an equidigital number, since it uses as much as digits as its factorization.

51143291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 51143291 is about 7151.4537682908. The cubic root of 51143291 is about 371.1899623653.

The spelling of 51143291 in words is "fifty-one million, one hundred forty-three thousand, two hundred ninety-one".