222353221 has 4 divisors (see below), whose sum is σ = 222387552. Its totient is φ = 222318892.

The previous prime is 222353191. The next prime is 222353233. The reversal of 222353221 is 122353222.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122353222 = 2 ⋅61176611.

It is a cyclic number.

It is not a de Polignac number, because 222353221 - 2¹⁷ = 222222149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222353192 and 222353201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222353281) 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, 4171 + ... + 21496.

It is an arithmetic number, because the mean of its divisors is an integer number (55596888).

Almost surely, 2^222353221 is an apocalyptic number.

It is an amenable number.

222353221 is a deficient number, since it is larger than the sum of its proper divisors (34331).

222353221 is an equidigital number, since it uses as much as digits as its factorization.

222353221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34330.

The product of its digits is 1440, while the sum is 22.

The square root of 222353221 is about 14911.5130352356. The cubic root of 222353221 is about 605.8258611861.

Subtracting from 222353221 its reverse (122353222), we obtain a palindrome (99999999).

The spelling of 222353221 in words is "two hundred twenty-two million, three hundred fifty-three thousand, two hundred twenty-one".