198351 has 6 divisors (see below), whose sum is σ = 286520. Its totient is φ = 132228.

The previous prime is 198349. The next prime is 198377. The reversal of 198351 is 153891.

It is not a de Polignac number, because 198351 - 2¹ = 198349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11011 + ... + 11028.

2¹⁹⁸³⁵¹ is an apocalyptic number.

198351 is a deficient number, since it is larger than the sum of its proper divisors (88169).

198351 is a wasteful number, since it uses less digits than its factorization.

198351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22045 (or 22042 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 198351 is about 445.3661415061. The cubic root of 198351 is about 58.3191874996.

The spelling of 198351 in words is "one hundred ninety-eight thousand, three hundred fifty-one".