223212217 has 8 divisors (see below), whose sum is σ = 240949440. Its totient is φ = 206144400.

The previous prime is 223212211. The next prime is 223212221. The reversal of 223212217 is 712212322.

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

It is a de Polignac number, because none of the positive numbers 2^k-223212217 is a prime.

It is a super-3 number, since 3×223212217³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166659 + ... + 167992.

It is an arithmetic number, because the mean of its divisors is an integer number (30118680).

Almost surely, 2^223212217 is an apocalyptic number.

It is an amenable number.

223212217 is a deficient number, since it is larger than the sum of its proper divisors (17737223).

223212217 is a wasteful number, since it uses less digits than its factorization.

223212217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334703.

The product of its digits is 672, while the sum is 22.

The square root of 223212217 is about 14940.2883840975. The cubic root of 223212217 is about 606.6050018164.

Adding to 223212217 its reverse (712212322), we get a palindrome (935424539).

The spelling of 223212217 in words is "two hundred twenty-three million, two hundred twelve thousand, two hundred seventeen".