198601221 has 48 divisors (see below), whose sum is σ = 337206912. Its totient is φ = 101243520.

The previous prime is 198601217. The next prime is 198601279. The reversal of 198601221 is 122106891.

It is a happy number.

198601221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198601221 - 2² = 198601217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198601121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 261975 + ... + 262731.

It is an arithmetic number, because the mean of its divisors is an integer number (7025144).

Almost surely, 2^198601221 is an apocalyptic number.

It is an amenable number.

198601221 is a deficient number, since it is larger than the sum of its proper divisors (138605691).

198601221 is a wasteful number, since it uses less digits than its factorization.

198601221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 198601221 is about 14092.5945446536. The cubic root of 198601221 is about 583.4370053200.

The spelling of 198601221 in words is "one hundred ninety-eight million, six hundred one thousand, two hundred twenty-one".