221208113 has 8 divisors (see below), whose sum is σ = 252936000. Its totient is φ = 189511920.

The previous prime is 221208083. The next prime is 221208121. The reversal of 221208113 is 311802122.

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

It is a cyclic number.

It is not a de Polignac number, because 221208113 - 2⁶ = 221208049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221208173) 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, 9638 + ... + 23136.

It is an arithmetic number, because the mean of its divisors is an integer number (31617000).

Almost surely, 2^221208113 is an apocalyptic number.

It is an amenable number.

221208113 is a deficient number, since it is larger than the sum of its proper divisors (31727887).

221208113 is a wasteful number, since it uses less digits than its factorization.

221208113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15847.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 221208113 is about 14873.0666978939. The cubic root of 221208113 is about 604.7840797686.

The spelling of 221208113 in words is "two hundred twenty-one million, two hundred eight thousand, one hundred thirteen".