198243311 has 8 divisors (see below), whose sum is σ = 229432320. Its totient is φ = 167771448.

The previous prime is 198243301. The next prime is 198243313. The reversal of 198243311 is 113342891.

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 198243311 - 2²² = 194049007 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 (198243313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178691 + ... + 179796.

It is an arithmetic number, because the mean of its divisors is an integer number (28679040).

Almost surely, 2^198243311 is an apocalyptic number.

198243311 is a deficient number, since it is larger than the sum of its proper divisors (31189009).

198243311 is an equidigital number, since it uses as much as digits as its factorization.

198243311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358573.

The product of its digits is 5184, while the sum is 32.

The square root of 198243311 is about 14079.8903049704. The cubic root of 198243311 is about 583.0863134428.

The spelling of 198243311 in words is "one hundred ninety-eight million, two hundred forty-three thousand, three hundred eleven".