226609321 has 4 divisors (see below), whose sum is σ = 226642644. Its totient is φ = 226576000.

The previous prime is 226609309. The next prime is 226609381. The reversal of 226609321 is 123906622.

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 135978921 + 90630400 = 11661^2 + 9520^2 .

It is a 3-Lehmer number, since φ(226609321) divides (226609321-1)³.

It is a cyclic number.

It is not a de Polignac number, because 226609321 - 2⁵ = 226609289 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (226609381) 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, 2380 + ... + 21421.

It is an arithmetic number, because the mean of its divisors is an integer number (56660661).

Almost surely, 2^226609321 is an apocalyptic number.

226609321 is the 9521-st heptagonal number.

It is an amenable number.

226609321 is a deficient number, since it is larger than the sum of its proper divisors (33323).

226609321 is an equidigital number, since it uses as much as digits as its factorization.

226609321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33322.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 226609321 is about 15053.5484521092. The cubic root of 226609321 is about 609.6668619025. Note that the first 3 decimals are identical.

The spelling of 226609321 in words is "two hundred twenty-six million, six hundred nine thousand, three hundred twenty-one".