198356213 has 8 divisors (see below), whose sum is σ = 216629856. Its totient is φ = 180122800.

The previous prime is 198356203. The next prime is 198356227. The reversal of 198356213 is 312653891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198356213 - 2¹² = 198352117 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 (198356203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770 + ... + 19932.

It is an arithmetic number, because the mean of its divisors is an integer number (27078732).

Almost surely, 2^198356213 is an apocalyptic number.

It is an amenable number.

198356213 is a deficient number, since it is larger than the sum of its proper divisors (18273643).

198356213 is a wasteful number, since it uses less digits than its factorization.

198356213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20115.

The product of its digits is 38880, while the sum is 38.

The square root of 198356213 is about 14083.8990695049. The cubic root of 198356213 is about 583.1969840413.

The spelling of 198356213 in words is "one hundred ninety-eight million, three hundred fifty-six thousand, two hundred thirteen".