51111686 has 16 divisors (see below), whose sum is σ = 77759136. Its totient is φ = 25194816.

The previous prime is 51111679. The next prime is 51111703. The reversal of 51111686 is 68611115.

51111686 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 2×51111686² = 5224808891525192, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 45200 + ... + 46316.

It is an arithmetic number, because the mean of its divisors is an integer number (4859946).

Almost surely, 2^51111686 is an apocalyptic number.

51111686 is a deficient number, since it is larger than the sum of its proper divisors (26647450).

51111686 is a wasteful number, since it uses less digits than its factorization.

51111686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423.

The product of its digits is 1440, while the sum is 29.

The square root of 51111686 is about 7149.2437362283. The cubic root of 51111686 is about 371.1134852365.

The spelling of 51111686 in words is "fifty-one million, one hundred eleven thousand, six hundred eighty-six".