198571 has 2 divisors, whose sum is σ = 198572. Its totient is φ = 198570.

The previous prime is 198553. The next prime is 198589. The reversal of 198571 is 175891.

It is a balanced prime because it is at equal distance from previous prime (198553) and next prime (198589).

It is an emirp because it is prime and its reverse (175891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198571 - 2¹¹ = 196523 is a prime.

It is a Chen prime.

It is equal to p₁₇₈₆₉ and since 198571 and 17869 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (198971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99285 + 99286.

It is an arithmetic number, because the mean of its divisors is an integer number (99286).

2¹⁹⁸⁵⁷¹ is an apocalyptic number.

198571 is a deficient number, since it is larger than the sum of its proper divisors (1).

198571 is an equidigital number, since it uses as much as digits as its factorization.

198571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 31.

The square root of 198571 is about 445.6130608499. The cubic root of 198571 is about 58.3407410094.

The spelling of 198571 in words is "one hundred ninety-eight thousand, five hundred seventy-one".