51486686 has 16 divisors (see below), whose sum is σ = 78779904. Its totient is φ = 25230744.

The previous prime is 51486671. The next prime is 51486739. The reversal of 51486686 is 68668415.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29021 + ... + 30743.

It is an arithmetic number, because the mean of its divisors is an integer number (4923744).

Almost surely, 2^51486686 is an apocalyptic number.

51486686 is a deficient number, since it is larger than the sum of its proper divisors (27293218).

51486686 is a wasteful number, since it uses less digits than its factorization.

51486686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015.

The product of its digits is 276480, while the sum is 44.

The square root of 51486686 is about 7175.4223569069. The cubic root of 51486686 is about 372.0188788739.

The spelling of 51486686 in words is "fifty-one million, four hundred eighty-six thousand, six hundred eighty-six".