223130221 has 4 divisors (see below), whose sum is σ = 223175932. Its totient is φ = 223084512.

The previous prime is 223130213. The next prime is 223130231. The reversal of 223130221 is 122031322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173976100 + 49154121 = 13190^2 + 7011^2 .

It is a cyclic number.

It is not a de Polignac number, because 223130221 - 2³ = 223130213 is a prime.

It is a super-3 number, since 3×223130221³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223130195 and 223130204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223130231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14520 + ... + 25633.

It is an arithmetic number, because the mean of its divisors is an integer number (55793983).

Almost surely, 2^223130221 is an apocalyptic number.

It is an amenable number.

223130221 is a deficient number, since it is larger than the sum of its proper divisors (45711).

223130221 is an equidigital number, since it uses as much as digits as its factorization.

223130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45710.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 223130221 is about 14937.5440083034. The cubic root of 223130221 is about 606.5307148499.

Adding to 223130221 its reverse (122031322), we get a palindrome (345161543).

The spelling of 223130221 in words is "two hundred twenty-three million, one hundred thirty thousand, two hundred twenty-one".