198101025 has 24 divisors (see below), whose sum is σ = 363920160. Its totient is φ = 105653520.

The previous prime is 198101023. The next prime is 198101081. The reversal of 198101025 is 520101891.

It is not a de Polignac number, because 198101025 - 2¹ = 198101023 is a prime.

It is a super-2 number, since 2×198101025² = 78488032212101250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 198101025.

It is not an unprimeable number, because it can be changed into a prime (198101021) 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 23 ways as a sum of consecutive naturals, for example, 146067 + ... + 147416.

It is an arithmetic number, because the mean of its divisors is an integer number (15163340).

Almost surely, 2^198101025 is an apocalyptic number.

198101025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198101025 is a deficient number, since it is larger than the sum of its proper divisors (165819135).

198101025 is a wasteful number, since it uses less digits than its factorization.

198101025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293502 (or 293491 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 198101025 is about 14074.8365887494. The cubic root of 198101025 is about 582.9467797294.

The spelling of 198101025 in words is "one hundred ninety-eight million, one hundred one thousand, twenty-five".