168221084 has 12 divisors (see below), whose sum is σ = 300650784. Its totient is φ = 82320864.

The previous prime is 168221071. The next prime is 168221093. The reversal of 168221084 is 480122861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 168221084.

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 3 ways as a sum of consecutive naturals, for example, 447209 + ... + 447584.

It is an arithmetic number, because the mean of its divisors is an integer number (25054232).

Almost surely, 2^168221084 is an apocalyptic number.

It is an amenable number.

168221084 is a deficient number, since it is larger than the sum of its proper divisors (132429700).

168221084 is a wasteful number, since it uses less digits than its factorization.

168221084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894844 (or 894842 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 168221084 is about 12970.0070932903. The cubic root of 168221084 is about 552.0267744137.

The spelling of 168221084 in words is "one hundred sixty-eight million, two hundred twenty-one thousand, eighty-four".