51286808 has 8 divisors (see below), whose sum is σ = 96162780. Its totient is φ = 25643400.

The previous prime is 51286801. The next prime is 51286811. The reversal of 51286808 is 80868215.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51286801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205418 + ... + 3205433.

Almost surely, 2^51286808 is an apocalyptic number.

It is an amenable number.

51286808 is a deficient number, since it is larger than the sum of its proper divisors (44875972).

51286808 is a wasteful number, since it uses less digits than its factorization.

51286808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410857 (or 6410853 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 51286808 is about 7161.4808524494. The cubic root of 51286808 is about 371.5368460333.

The spelling of 51286808 in words is "fifty-one million, two hundred eighty-six thousand, eight hundred eight".