198530111 has 16 divisors (see below), whose sum is σ = 216652128. Its totient is φ = 180835200.

The previous prime is 198530071. The next prime is 198530117. The reversal of 198530111 is 111035891.

It is not a de Polignac number, because 198530111 - 2¹⁴ = 198513727 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 (198530117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430421 + ... + 430881.

It is an arithmetic number, because the mean of its divisors is an integer number (13540758).

Almost surely, 2^198530111 is an apocalyptic number.

198530111 is a deficient number, since it is larger than the sum of its proper divisors (18122017).

198530111 is a wasteful number, since it uses less digits than its factorization.

198530111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 198530111 is about 14090.0713624878. The cubic root of 198530111 is about 583.3673629853.

The spelling of 198530111 in words is "one hundred ninety-eight million, five hundred thirty thousand, one hundred eleven".