198831 has 8 divisors (see below), whose sum is σ = 267264. Its totient is φ = 131480.

The previous prime is 198829. The next prime is 198833. The reversal of 198831 is 138891.

198831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (198829) and next prime (198833).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198831 - 2¹ = 198829 is a prime.

It is a super-2 number, since 2×198831² = 79067533122, which contains 22 as substring.

198831 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400 + ... + 746.

It is an arithmetic number, because the mean of its divisors is an integer number (33408).

2¹⁹⁸⁸³¹ is an apocalyptic number.

198831 is a deficient number, since it is larger than the sum of its proper divisors (68433).

198831 is a wasteful number, since it uses less digits than its factorization.

198831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its digits is 1728, while the sum is 30.

The square root of 198831 is about 445.9046983381. The cubic root of 198831 is about 58.3661928245.

The spelling of 198831 in words is "one hundred ninety-eight thousand, eight hundred thirty-one".