198805331 has 2 divisors, whose sum is σ = 198805332. Its totient is φ = 198805330.

The previous prime is 198805319. The next prime is 198805333. The reversal of 198805331 is 133508891.

It is a strong prime.

It is an emirp because it is prime and its reverse (133508891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198805331 - 2⁶ = 198805267 is a prime.

It is a super-2 number, since 2×198805331² = 79047119268039122, which contains 22 as substring.

Together with 198805333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198805333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99402665 + 99402666.

It is an arithmetic number, because the mean of its divisors is an integer number (99402666).

Almost surely, 2^198805331 is an apocalyptic number.

198805331 is a deficient number, since it is larger than the sum of its proper divisors (1).

198805331 is an equidigital number, since it uses as much as digits as its factorization.

198805331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 198805331 is about 14099.8344316520. The cubic root of 198805331 is about 583.6368103257.

The spelling of 198805331 in words is "one hundred ninety-eight million, eight hundred five thousand, three hundred thirty-one".