223100221 has 2 divisors, whose sum is σ = 223100222. Its totient is φ = 223100220.

The previous prime is 223100209. The next prime is 223100249. The reversal of 223100221 is 122001322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190164100 + 32936121 = 13790^2 + 5739^2 .

It is a cyclic number.

It is not a de Polignac number, because 223100221 - 2²³ = 214711613 is a prime.

It is a super-3 number, since 3×223100221³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223100201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111550110 + 111550111.

It is an arithmetic number, because the mean of its divisors is an integer number (111550111).

Almost surely, 2^223100221 is an apocalyptic number.

It is an amenable number.

223100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223100221 is an equidigital number, since it uses as much as digits as its factorization.

223100221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 223100221 is about 14936.5397934060. The cubic root of 223100221 is about 606.5035308182.

Adding to 223100221 its reverse (122001322), we get a palindrome (345101543).

The spelling of 223100221 in words is "two hundred twenty-three million, one hundred thousand, two hundred twenty-one".