221417 has 8 divisors (see below), whose sum is σ = 258816. Its totient is φ = 185472.

The previous prime is 221413. The next prime is 221447. The reversal of 221417 is 714122.

221417 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 221417 - 2² = 221413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221395 and 221404.

It is not an unprimeable number, because it can be changed into a prime (221411) 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, 8 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (32352).

2²²¹⁴¹⁷ is an apocalyptic number.

It is an amenable number.

221417 is a deficient number, since it is larger than the sum of its proper divisors (37399).

221417 is an equidigital number, since it uses as much as digits as its factorization.

221417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its digits is 112, while the sum is 17.

The square root of 221417 is about 470.5496785675. The cubic root of 221417 is about 60.4974385911.

Adding to 221417 its reverse (714122), we get a palindrome (935539).

The spelling of 221417 in words is "two hundred twenty-one thousand, four hundred seventeen", and thus it is an iban number.