221223313 has 8 divisors (see below), whose sum is σ = 226616832. Its totient is φ = 215858496.

The previous prime is 221223311. The next prime is 221223323. The reversal of 221223313 is 313322122.

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 221223313 - 2¹ = 221223311 is a prime.

It is a super-4 number, since 4×221223313⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221223311) 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, 8856 + ... + 22822.

It is an arithmetic number, because the mean of its divisors is an integer number (28327104).

Almost surely, 2^221223313 is an apocalyptic number.

It is an amenable number.

221223313 is a deficient number, since it is larger than the sum of its proper divisors (5393519).

221223313 is a wasteful number, since it uses less digits than its factorization.

221223313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14351.

The product of its digits is 432, while the sum is 19.

The square root of 221223313 is about 14873.5776798993. The cubic root of 221223313 is about 604.7979317432.

Adding to 221223313 its reverse (313322122), we get a palindrome (534545435).

The spelling of 221223313 in words is "two hundred twenty-one million, two hundred twenty-three thousand, three hundred thirteen".