51384859 has 2 divisors, whose sum is σ = 51384860. Its totient is φ = 51384858.

The previous prime is 51384857. The next prime is 51384869. The reversal of 51384859 is 95848315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51384859 - 2¹ = 51384857 is a prime.

Together with 51384857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51384857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25692429 + 25692430.

It is an arithmetic number, because the mean of its divisors is an integer number (25692430).

Almost surely, 2^51384859 is an apocalyptic number.

51384859 is a deficient number, since it is larger than the sum of its proper divisors (1).

51384859 is an equidigital number, since it uses as much as digits as its factorization.

51384859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The square root of 51384859 is about 7168.3233046508. The cubic root of 51384859 is about 371.7734654798.

The spelling of 51384859 in words is "fifty-one million, three hundred eighty-four thousand, eight hundred fifty-nine".