168198331 has 6 divisors (see below), whose sum is σ = 195659340. Its totient is φ = 144169956.

The previous prime is 168198319. The next prime is 168198397. The reversal of 168198331 is 133891861.

It is not a de Polignac number, because 168198331 - 2⁵ = 168198299 is a prime.

It is a super-2 number, since 2×168198331² = 56581357102371122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168198311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1716261 + ... + 1716358.

It is an arithmetic number, because the mean of its divisors is an integer number (32609890).

Almost surely, 2^168198331 is an apocalyptic number.

168198331 is a deficient number, since it is larger than the sum of its proper divisors (27461009).

168198331 is an equidigital number, since it uses as much as digits as its factorization.

168198331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432633 (or 3432626 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 168198331 is about 12969.1299245555. The cubic root of 168198331 is about 552.0018848829.

The spelling of 168198331 in words is "one hundred sixty-eight million, one hundred ninety-eight thousand, three hundred thirty-one".