168213284 has 6 divisors (see below), whose sum is σ = 294373254. Its totient is φ = 84106640.

The previous prime is 168213277. The next prime is 168213299. The reversal of 168213284 is 482312861.

168213284 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 144961600 + 23251684 = 12040^2 + 4822^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21026657 + ... + 21026664.

It is an arithmetic number, because the mean of its divisors is an integer number (49062209).

Almost surely, 2^168213284 is an apocalyptic number.

It is an amenable number.

168213284 is a deficient number, since it is larger than the sum of its proper divisors (126159970).

168213284 is a wasteful number, since it uses less digits than its factorization.

168213284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42053325 (or 42053323 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 168213284 is about 12969.7063960600. The cubic root of 168213284 is about 552.0182422383.

The spelling of 168213284 in words is "one hundred sixty-eight million, two hundred thirteen thousand, two hundred eighty-four".