51289286 has 4 divisors (see below), whose sum is σ = 76933932. Its totient is φ = 25644642.

The previous prime is 51289243. The next prime is 51289297. The reversal of 51289286 is 68298215.

51289286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 12822320 + ... + 12822323.

It is an arithmetic number, because the mean of its divisors is an integer number (19233483).

Almost surely, 2^51289286 is an apocalyptic number.

51289286 is a deficient number, since it is larger than the sum of its proper divisors (25644646).

51289286 is a wasteful number, since it uses less digits than its factorization.

51289286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25644645.

The product of its digits is 69120, while the sum is 41.

The square root of 51289286 is about 7161.6538592702. The cubic root of 51289286 is about 371.5428297259.

It can be divided in two parts, 512 and 89286, that added together give a palindrome (89798).

The spelling of 51289286 in words is "fifty-one million, two hundred eighty-nine thousand, two hundred eighty-six".