198203145 has 32 divisors (see below), whose sum is σ = 364465920. Its totient is φ = 90097920.

The previous prime is 198203141. The next prime is 198203147. The reversal of 198203145 is 541302891.

It is not a de Polignac number, because 198203145 - 2² = 198203141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198203141) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 13791 + ... + 24219.

It is an arithmetic number, because the mean of its divisors is an integer number (11389560).

Almost surely, 2^198203145 is an apocalyptic number.

198203145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198203145 is a deficient number, since it is larger than the sum of its proper divisors (166262775).

198203145 is a wasteful number, since it uses less digits than its factorization.

198203145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10625.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 198203145 is about 14078.4638721701. The cubic root of 198203145 is about 583.0469311527.

The spelling of 198203145 in words is "one hundred ninety-eight million, two hundred three thousand, one hundred forty-five".