226640173 has 2 divisors, whose sum is σ = 226640174. Its totient is φ = 226640172.

The previous prime is 226640159. The next prime is 226640201. The reversal of 226640173 is 371046622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170119849 + 56520324 = 13043^2 + 7518^2 .

It is a cyclic number.

It is not a de Polignac number, because 226640173 - 2⁹ = 226639661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226640123) 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, 113320086 + 113320087.

It is an arithmetic number, because the mean of its divisors is an integer number (113320087).

Almost surely, 2^226640173 is an apocalyptic number.

It is an amenable number.

226640173 is a deficient number, since it is larger than the sum of its proper divisors (1).

226640173 is an equidigital number, since it uses as much as digits as its factorization.

226640173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 226640173 is about 15054.5731590105. The cubic root of 226640173 is about 609.6945285910.

Adding to 226640173 its reverse (371046622), we get a palindrome (597686795).

The spelling of 226640173 in words is "two hundred twenty-six million, six hundred forty thousand, one hundred seventy-three".