198000025 has 12 divisors (see below), whose sum is σ = 246760000. Its totient is φ = 157600080.

The previous prime is 198000001. The next prime is 198000053. The reversal of 198000025 is 520000891.

It is not a de Polignac number, because 198000025 - 2¹¹ = 197997977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 14925 + ... + 24874.

Almost surely, 2^198000025 is an apocalyptic number.

It is an amenable number.

198000025 is a deficient number, since it is larger than the sum of its proper divisors (48759975).

198000025 is a wasteful number, since it uses less digits than its factorization.

198000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40008 (or 40003 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 198000025 is about 14071.2481678066. The cubic root of 198000025 is about 582.8476928558.

The spelling of 198000025 in words is "one hundred ninety-eight million, twenty-five", and thus it is an aban number.