198522001 has 2 divisors, whose sum is σ = 198522002. Its totient is φ = 198522000.

The previous prime is 198521989. The next prime is 198522007. The reversal of 198522001 is 100225891.

198522001 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 can be written as a sum of positive squares in only one way, i.e., 194323600 + 4198401 = 13940^2 + 2049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198522001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198522007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99261000 + 99261001.

It is an arithmetic number, because the mean of its divisors is an integer number (99261001).

Almost surely, 2^198522001 is an apocalyptic number.

It is an amenable number.

198522001 is a deficient number, since it is larger than the sum of its proper divisors (1).

198522001 is an equidigital number, since it uses as much as digits as its factorization.

198522001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 198522001 is about 14089.7835682455. The cubic root of 198522001 is about 583.3594193142.

Adding to 198522001 its reverse (100225891), we get a palindrome (298747892).

The spelling of 198522001 in words is "one hundred ninety-eight million, five hundred twenty-two thousand, one".