198108051 has 4 divisors (see below), whose sum is σ = 264144072. Its totient is φ = 132072032.

The previous prime is 198108049. The next prime is 198108061. The reversal of 198108051 is 150801891.

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 198108051 - 2¹ = 198108049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198108061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33018006 + ... + 33018011.

It is an arithmetic number, because the mean of its divisors is an integer number (66036018).

Almost surely, 2^198108051 is an apocalyptic number.

198108051 is a deficient number, since it is larger than the sum of its proper divisors (66036021).

198108051 is an equidigital number, since it uses as much as digits as its factorization.

198108051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66036020.

The product of its (nonzero) digits is 2880, while the sum is 33.

The square root of 198108051 is about 14075.0861809084. The cubic root of 198108051 is about 582.9536713909.

The spelling of 198108051 in words is "one hundred ninety-eight million, one hundred eight thousand, fifty-one".