51442843 has 2 divisors, whose sum is σ = 51442844. Its totient is φ = 51442842.

The previous prime is 51442829. The next prime is 51442871. The reversal of 51442843 is 34824415.

51442843 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-51442843 is a prime.

It is not a weakly prime, because it can be changed into another prime (51442813) 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, 25721421 + 25721422.

It is an arithmetic number, because the mean of its divisors is an integer number (25721422).

Almost surely, 2^51442843 is an apocalyptic number.

51442843 is a deficient number, since it is larger than the sum of its proper divisors (1).

51442843 is an equidigital number, since it uses as much as digits as its factorization.

51442843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 31.

The square root of 51442843 is about 7172.3666247620. The cubic root of 51442843 is about 371.9132525018.

The spelling of 51442843 in words is "fifty-one million, four hundred forty-two thousand, eight hundred forty-three".