198474221 has 8 divisors (see below), whose sum is σ = 216648000. Its totient is φ = 180322240.

The previous prime is 198474169. The next prime is 198474223. The reversal of 198474221 is 122474891.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198474221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198474223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18005 + ... + 26853.

It is an arithmetic number, because the mean of its divisors is an integer number (27081000).

Almost surely, 2^198474221 is an apocalyptic number.

198474221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

198474221 is a deficient number, since it is larger than the sum of its proper divisors (18173779).

198474221 is a wasteful number, since it uses less digits than its factorization.

198474221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10899.

The product of its digits is 32256, while the sum is 38.

The square root of 198474221 is about 14088.0879114236. The cubic root of 198474221 is about 583.3126148469.

The spelling of 198474221 in words is "one hundred ninety-eight million, four hundred seventy-four thousand, two hundred twenty-one".