198218183 has 2 divisors, whose sum is σ = 198218184. Its totient is φ = 198218182.

The previous prime is 198218087. The next prime is 198218197. The reversal of 198218183 is 381812891.

198218183 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (381812891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198218183 - 2²⁰ = 197169607 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198218183.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198218983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99109091 + 99109092.

It is an arithmetic number, because the mean of its divisors is an integer number (99109092).

Almost surely, 2^198218183 is an apocalyptic number.

198218183 is a deficient number, since it is larger than the sum of its proper divisors (1).

198218183 is an equidigital number, since it uses as much as digits as its factorization.

198218183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 41.

The square root of 198218183 is about 14078.9979401945. The cubic root of 198218183 is about 583.0616763577.

It can be divided in two parts, 198 and 218183, that multiplied together give a palindrome (43200234).

The spelling of 198218183 in words is "one hundred ninety-eight million, two hundred eighteen thousand, one hundred eighty-three".