198253555 has 4 divisors (see below), whose sum is σ = 237904272. Its totient is φ = 158602840.

The previous prime is 198253519. The next prime is 198253571. The reversal of 198253555 is 555352891.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 198253555 - 2⁷ = 198253427 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 19825351 + ... + 19825360.

It is an arithmetic number, because the mean of its divisors is an integer number (59476068).

Almost surely, 2^198253555 is an apocalyptic number.

198253555 is a deficient number, since it is larger than the sum of its proper divisors (39650717).

198253555 is an equidigital number, since it uses as much as digits as its factorization.

198253555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39650716.

The product of its digits is 270000, while the sum is 43.

The square root of 198253555 is about 14080.2540815143. The cubic root of 198253555 is about 583.0963567128.

The spelling of 198253555 in words is "one hundred ninety-eight million, two hundred fifty-three thousand, five hundred fifty-five".