53185986 has 24 divisors (see below), whose sum is σ = 131698944. Its totient is φ = 15195960.

The previous prime is 53185981. The next prime is 53186011. The reversal of 53185986 is 68958135.

53185986 is a `hidden beast` number, since 53 + 1 + 8 + 598 + 6 = 666.

53185986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (53185981) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 210930 + ... + 211181.

It is an arithmetic number, because the mean of its divisors is an integer number (5487456).

Almost surely, 2^53185986 is an apocalyptic number.

53185986 is an abundant number, since it is smaller than the sum of its proper divisors (78512958).

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

53185986 is a wasteful number, since it uses less digits than its factorization.

53185986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422126 (or 422123 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 53185986 is about 7292.8722736656. The cubic root of 53185986 is about 376.0674439527.

The spelling of 53185986 in words is "fifty-three million, one hundred eighty-five thousand, nine hundred eighty-six".