226220321 has 2 divisors, whose sum is σ = 226220322. Its totient is φ = 226220320.

The previous prime is 226220311. The next prime is 226220333. The reversal of 226220321 is 123022622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216678400 + 9541921 = 14720^2 + 3089^2 .

It is a cyclic number.

It is not a de Polignac number, because 226220321 - 2¹⁸ = 225958177 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 226220293 and 226220302.

It is not a weakly prime, because it can be changed into another prime (226220311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113110160 + 113110161.

It is an arithmetic number, because the mean of its divisors is an integer number (113110161).

Almost surely, 2^226220321 is an apocalyptic number.

It is an amenable number.

226220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

226220321 is an equidigital number, since it uses as much as digits as its factorization.

226220321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 226220321 is about 15040.6223607935. The cubic root of 226220321 is about 609.3178085305.

Adding to 226220321 its reverse (123022622), we get a palindrome (349242943).

The spelling of 226220321 in words is "two hundred twenty-six million, two hundred twenty thousand, three hundred twenty-one".