226566181 has 2 divisors, whose sum is σ = 226566182. Its totient is φ = 226566180.

The previous prime is 226566173. The next prime is 226566199. The reversal of 226566181 is 181665622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220968225 + 5597956 = 14865^2 + 2366^2 .

It is a cyclic number.

It is not a de Polignac number, because 226566181 - 2³ = 226566173 is a prime.

It is a super-2 number, since 2×226566181² = 102664468745849522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 226566181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226566481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113283090 + 113283091.

It is an arithmetic number, because the mean of its divisors is an integer number (113283091).

Almost surely, 2^226566181 is an apocalyptic number.

It is an amenable number.

226566181 is a deficient number, since it is larger than the sum of its proper divisors (1).

226566181 is an equidigital number, since it uses as much as digits as its factorization.

226566181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 226566181 is about 15052.1154991582. The cubic root of 226566181 is about 609.6281716764.

The spelling of 226566181 in words is "two hundred twenty-six million, five hundred sixty-six thousand, one hundred eighty-one".