51186486 has 16 divisors (see below), whose sum is σ = 110247984. Its totient is φ = 15749664.

The previous prime is 51186467. The next prime is 51186511. The reversal of 51186486 is 68468115.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 328041 + ... + 328196.

It is an arithmetic number, because the mean of its divisors is an integer number (6890499).

Almost surely, 2^51186486 is an apocalyptic number.

51186486 is an abundant number, since it is smaller than the sum of its proper divisors (59061498).

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

51186486 is a wasteful number, since it uses less digits than its factorization.

51186486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656255.

The product of its digits is 46080, while the sum is 39.

The square root of 51186486 is about 7154.4731462212. The cubic root of 51186486 is about 371.2944337978.

The spelling of 51186486 in words is "fifty-one million, one hundred eighty-six thousand, four hundred eighty-six".