198542133 has 18 divisors (see below), whose sum is σ = 304648994. Its totient is φ = 124573824.

The previous prime is 198542087. The next prime is 198542143. The reversal of 198542133 is 331245891.

It can be written as a sum of positive squares in 3 ways, for example, as 52664049 + 145878084 = 7257^2 + 12078^2 .

It is a de Polignac number, because none of the positive numbers 2^k-198542133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198542143) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35566 + ... + 40767.

Almost surely, 2^198542133 is an apocalyptic number.

It is an amenable number.

198542133 is a deficient number, since it is larger than the sum of its proper divisors (106106861).

198542133 is a wasteful number, since it uses less digits than its factorization.

198542133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76373 (or 76353 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 198542133 is about 14090.4979684893. The cubic root of 198542133 is about 583.3791380268.

The spelling of 198542133 in words is "one hundred ninety-eight million, five hundred forty-two thousand, one hundred thirty-three".