221430226 has 4 divisors (see below), whose sum is σ = 332145342. Its totient is φ = 110715112.

The previous prime is 221430203. The next prime is 221430227. The reversal of 221430226 is 622034122.

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

It can be written as a sum of positive squares in only one way, i.e., 196420225 + 25010001 = 14015^2 + 5001^2 .

It is a super-2 number, since 2×221430226² = 98062689972822152, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 221430197 and 221430206.

It is not an unprimeable number, because it can be changed into a prime (221430227) 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 as a sum of consecutive naturals, namely, 55357555 + ... + 55357558.

Almost surely, 2^221430226 is an apocalyptic number.

221430226 is a deficient number, since it is larger than the sum of its proper divisors (110715116).

221430226 is a wasteful number, since it uses less digits than its factorization.

221430226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110715115.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 221430226 is about 14880.5317781321. The cubic root of 221430226 is about 604.9864314057.

Adding to 221430226 its reverse (622034122), we get a palindrome (843464348).

The spelling of 221430226 in words is "two hundred twenty-one million, four hundred thirty thousand, two hundred twenty-six".