226603021 has 2 divisors, whose sum is σ = 226603022. Its totient is φ = 226603020.

The previous prime is 226603007. The next prime is 226603033. The reversal of 226603021 is 120306622.

It is a happy number.

It is the 6146-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212838921 + 13764100 = 14589^2 + 3710^2 .

It is a cyclic number.

It is not a de Polignac number, because 226603021 - 2²⁵ = 193048589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 226602983 and 226603001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226603001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113301510 + 113301511.

It is an arithmetic number, because the mean of its divisors is an integer number (113301511).

Almost surely, 2^226603021 is an apocalyptic number.

It is an amenable number.

226603021 is a deficient number, since it is larger than the sum of its proper divisors (1).

226603021 is an equidigital number, since it uses as much as digits as its factorization.

226603021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 226603021 is about 15053.3391976664. The cubic root of 226603021 is about 609.6612120366.

Adding to 226603021 its reverse (120306622), we get a palindrome (346909643).

The spelling of 226603021 in words is "two hundred twenty-six million, six hundred three thousand, twenty-one".