198211801 has 4 divisors (see below), whose sum is σ = 198559504. Its totient is φ = 197864100.

The previous prime is 198211759. The next prime is 198211817. The reversal of 198211801 is 108112891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198211801 - 2⁹ = 198211289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198211001) 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, 172995 + ... + 174136.

It is an arithmetic number, because the mean of its divisors is an integer number (49639876).

Almost surely, 2^198211801 is an apocalyptic number.

It is an amenable number.

198211801 is a deficient number, since it is larger than the sum of its proper divisors (347703).

198211801 is an equidigital number, since it uses as much as digits as its factorization.

198211801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347702.

The product of its (nonzero) digits is 1152, while the sum is 31.

The square root of 198211801 is about 14078.7712887169. The cubic root of 198211801 is about 583.0554187085.

The spelling of 198211801 in words is "one hundred ninety-eight million, two hundred eleven thousand, eight hundred one".