225969889 has 2 divisors, whose sum is σ = 225969890. Its totient is φ = 225969888.

The previous prime is 225969853. The next prime is 225969893. The reversal of 225969889 is 988969522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161086864 + 64883025 = 12692^2 + 8055^2 .

It is a cyclic number.

It is not a de Polignac number, because 225969889 - 2¹⁵ = 225937121 is a prime.

It is not a weakly prime, because it can be changed into another prime (225969589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112984944 + 112984945.

It is an arithmetic number, because the mean of its divisors is an integer number (112984945).

Almost surely, 2^225969889 is an apocalyptic number.

It is an amenable number.

225969889 is a deficient number, since it is larger than the sum of its proper divisors (1).

225969889 is an equidigital number, since it uses as much as digits as its factorization.

225969889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 58.

The square root of 225969889 is about 15032.2948680499. The cubic root of 225969889 is about 609.0928817578.

The spelling of 225969889 in words is "two hundred twenty-five million, nine hundred sixty-nine thousand, eight hundred eighty-nine".