226533221 has 2 divisors, whose sum is σ = 226533222. Its totient is φ = 226533220.

The previous prime is 226533217. The next prime is 226533269. The reversal of 226533221 is 122335622.

226533221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225420196 + 1113025 = 15014^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 226533221 - 2² = 226533217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226833221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113266610 + 113266611.

It is an arithmetic number, because the mean of its divisors is an integer number (113266611).

Almost surely, 2^226533221 is an apocalyptic number.

It is an amenable number.

226533221 is a deficient number, since it is larger than the sum of its proper divisors (1).

226533221 is an equidigital number, since it uses as much as digits as its factorization.

226533221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 226533221 is about 15051.0205966240. The cubic root of 226533221 is about 609.5986081012.

Adding to 226533221 its reverse (122335622), we get a palindrome (348868843).

The spelling of 226533221 in words is "two hundred twenty-six million, five hundred thirty-three thousand, two hundred twenty-one".