198515 has 4 divisors (see below), whose sum is σ = 238224. Its totient is φ = 158808.

The previous prime is 198503. The next prime is 198529. The reversal of 198515 is 515891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198515 - 2⁸ = 198259 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198515.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19847 + ... + 19856.

It is an arithmetic number, because the mean of its divisors is an integer number (59556).

2¹⁹⁸⁵¹⁵ is an apocalyptic number.

198515 is a deficient number, since it is larger than the sum of its proper divisors (39709).

198515 is an equidigital number, since it uses as much as digits as its factorization.

198515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39708.

The product of its digits is 1800, while the sum is 29.

The square root of 198515 is about 445.5502216361. The cubic root of 198515 is about 58.3352561724.

The spelling of 198515 in words is "one hundred ninety-eight thousand, five hundred fifteen".