198818255 has 8 divisors (see below), whose sum is σ = 238772832. Its totient is φ = 158927328.

The previous prime is 198818251. The next prime is 198818267. The reversal of 198818255 is 552818891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198818255 - 2² = 198818251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198818251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8744 + ... + 21773.

It is an arithmetic number, because the mean of its divisors is an integer number (29846604).

Almost surely, 2^198818255 is an apocalyptic number.

198818255 is a deficient number, since it is larger than the sum of its proper divisors (39954577).

198818255 is a wasteful number, since it uses less digits than its factorization.

198818255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31825.

The product of its digits is 230400, while the sum is 47.

The square root of 198818255 is about 14100.2927274578. The cubic root of 198818255 is about 583.6494571339.

It can be divided in two parts, 1988 and 18255, that multiplied together give a triangular number (36290940 = T₈₅₁₉).

The spelling of 198818255 in words is "one hundred ninety-eight million, eight hundred eighteen thousand, two hundred fifty-five".