51863886 has 12 divisors (see below), whose sum is σ = 112371792. Its totient is φ = 17287956.

The previous prime is 51863869. The next prime is 51863897. The reversal of 51863886 is 68836815.

51863886 is a `hidden beast` number, since 5 + 1 + 8 + 638 + 8 + 6 = 666.

51863886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 in 5 ways as a sum of consecutive naturals, for example, 1440646 + ... + 1440681.

It is an arithmetic number, because the mean of its divisors is an integer number (9364316).

Almost surely, 2^51863886 is an apocalyptic number.

51863886 is an abundant number, since it is smaller than the sum of its proper divisors (60507906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51863886 is a wasteful number, since it uses less digits than its factorization.

51863886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881335 (or 2881332 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 51863886 is about 7201.6585589710. The cubic root of 51863886 is about 372.9251599424.

The spelling of 51863886 in words is "fifty-one million, eight hundred sixty-three thousand, eight hundred eighty-six".