51686888 has 32 divisors (see below), whose sum is σ = 110324160. Its totient is φ = 22471680.

The previous prime is 51686879. The next prime is 51686893. The reversal of 51686888 is 88868615.

51686888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51686888² = 5343068782249088, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 10745 + ... + 14792.

It is an arithmetic number, because the mean of its divisors is an integer number (3447630).

Almost surely, 2^51686888 is an apocalyptic number.

It is an amenable number.

51686888 is an abundant number, since it is smaller than the sum of its proper divisors (58637272).

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

51686888 is a wasteful number, since it uses less digits than its factorization.

51686888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25577 (or 25573 counting only the distinct ones).

The product of its digits is 737280, while the sum is 50.

The square root of 51686888 is about 7189.3593594979. The cubic root of 51686888 is about 372.5004441236.

The spelling of 51686888 in words is "fifty-one million, six hundred eighty-six thousand, eight hundred eighty-eight".