223210221 has 16 divisors (see below), whose sum is σ = 339361344. Its totient is φ = 129279744.

The previous prime is 223210219. The next prime is 223210237. The reversal of 223210221 is 122012322.

It is a happy number.

It is not a de Polignac number, because 223210221 - 2¹ = 223210219 is a prime.

It is a super-3 number, since 3×223210221³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 223210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223210241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167671 + ... + 168996.

It is an arithmetic number, because the mean of its divisors is an integer number (21210084).

Almost surely, 2^223210221 is an apocalyptic number.

It is an amenable number.

223210221 is a deficient number, since it is larger than the sum of its proper divisors (116151123).

223210221 is a wasteful number, since it uses less digits than its factorization.

223210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336700.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 223210221 is about 14940.2215847021. The cubic root of 223210221 is about 606.6031936907.

Adding to 223210221 its reverse (122012322), we get a palindrome (345222543).

The spelling of 223210221 in words is "two hundred twenty-three million, two hundred ten thousand, two hundred twenty-one".