198271585 has 16 divisors (see below), whose sum is σ = 241823232. Its totient is φ = 156040000.

The previous prime is 198271553. The next prime is 198271603. The reversal of 198271585 is 585172891.

It is not a de Polignac number, because 198271585 - 2⁵ = 198271553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83160 + ... + 85510.

It is an arithmetic number, because the mean of its divisors is an integer number (15113952).

Almost surely, 2^198271585 is an apocalyptic number.

It is an amenable number.

198271585 is a deficient number, since it is larger than the sum of its proper divisors (43551647).

198271585 is a wasteful number, since it uses less digits than its factorization.

198271585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624.

The product of its digits is 201600, while the sum is 46.

The square root of 198271585 is about 14080.8943252906. The cubic root of 198271585 is about 583.1140325768.

It can be divided in two parts, 19827 and 1585, that added together give a palindrome (21412).

The spelling of 198271585 in words is "one hundred ninety-eight million, two hundred seventy-one thousand, five hundred eighty-five".