198281815 has 16 divisors (see below), whose sum is σ = 256291200. Its totient is φ = 146778912.

The previous prime is 198281801. The next prime is 198281819. The reversal of 198281815 is 518182891.

It is a cyclic number.

It is not a de Polignac number, because 198281815 - 2⁷ = 198281687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198281819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20185 + ... + 28354.

It is an arithmetic number, because the mean of its divisors is an integer number (16018200).

Almost surely, 2^198281815 is an apocalyptic number.

198281815 is a deficient number, since it is larger than the sum of its proper divisors (58009385).

198281815 is a wasteful number, since it uses less digits than its factorization.

198281815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48606.

The product of its digits is 46080, while the sum is 43.

The square root of 198281815 is about 14081.2575787818. The cubic root of 198281815 is about 583.1240611679.

The spelling of 198281815 in words is "one hundred ninety-eight million, two hundred eighty-one thousand, eight hundred fifteen".