198252247 has 4 divisors (see below), whose sum is σ = 198775720. Its totient is φ = 197728776.

The previous prime is 198252239. The next prime is 198252259. The reversal of 198252247 is 742252891.

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

It is a cyclic number.

It is not a de Polignac number, because 198252247 - 2³ = 198252239 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 (198252227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261168 + ... + 261925.

It is an arithmetic number, because the mean of its divisors is an integer number (49693930).

Almost surely, 2^198252247 is an apocalyptic number.

198252247 is a deficient number, since it is larger than the sum of its proper divisors (523473).

198252247 is an equidigital number, since it uses as much as digits as its factorization.

198252247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523472.

The product of its digits is 80640, while the sum is 40.

The square root of 198252247 is about 14080.2076334122. The cubic root of 198252247 is about 583.0950743622.

The spelling of 198252247 in words is "one hundred ninety-eight million, two hundred fifty-two thousand, two hundred forty-seven".