225681163 has 2 divisors, whose sum is σ = 225681164. Its totient is φ = 225681162.

The previous prime is 225681143. The next prime is 225681173. The reversal of 225681163 is 361186522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225681163 - 2¹³ = 225672971 is a prime.

It is equal to p_12418099 and since 225681163 and 12418099 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (225681143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112840581 + 112840582.

It is an arithmetic number, because the mean of its divisors is an integer number (112840582).

Almost surely, 2^225681163 is an apocalyptic number.

225681163 is a deficient number, since it is larger than the sum of its proper divisors (1).

225681163 is an equidigital number, since it uses as much as digits as its factorization.

225681163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 225681163 is about 15022.6882747396. The cubic root of 225681163 is about 608.8333546948.

The spelling of 225681163 in words is "two hundred twenty-five million, six hundred eighty-one thousand, one hundred sixty-three".