223221129 has 4 divisors (see below), whose sum is σ = 297628176. Its totient is φ = 148814084.

The previous prime is 223221109. The next prime is 223221133. The reversal of 223221129 is 921122322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 223221129 - 2¹⁹ = 222696841 is a prime.

It is a super-3 number, since 3×223221129³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223221099 and 223221108.

It is not an unprimeable number, because it can be changed into a prime (223221109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37203519 + ... + 37203524.

It is an arithmetic number, because the mean of its divisors is an integer number (74407044).

Almost surely, 2^223221129 is an apocalyptic number.

It is an amenable number.

223221129 is a deficient number, since it is larger than the sum of its proper divisors (74407047).

223221129 is an equidigital number, since it uses as much as digits as its factorization.

223221129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74407046.

The product of its digits is 864, while the sum is 24.

The square root of 223221129 is about 14940.5866350689. The cubic root of 223221129 is about 606.6130748390.

The spelling of 223221129 in words is "two hundred twenty-three million, two hundred twenty-one thousand, one hundred twenty-nine".