221304117 has 8 divisors (see below), whose sum is σ = 297779680. Its totient is φ = 146182320.

The previous prime is 221304023. The next prime is 221304121. The reversal of 221304117 is 711403122.

221304117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221304117 - 2¹² = 221300021 is a prime.

It is a super-2 number, since 2×221304117² = 97951024402299378, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 221304093 and 221304102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221304197) 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, 338059 + ... + 338712.

It is an arithmetic number, because the mean of its divisors is an integer number (37222460).

Almost surely, 2^221304117 is an apocalyptic number.

It is an amenable number.

221304117 is a deficient number, since it is larger than the sum of its proper divisors (76475563).

221304117 is a wasteful number, since it uses less digits than its factorization.

221304117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676883.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 221304117 is about 14876.2937924740. The cubic root of 221304117 is about 604.8715589189.

Adding to 221304117 its reverse (711403122), we get a palindrome (932707239).

The spelling of 221304117 in words is "two hundred twenty-one million, three hundred four thousand, one hundred seventeen".