225518669 has 2 divisors, whose sum is σ = 225518670. Its totient is φ = 225518668.

The previous prime is 225518653. The next prime is 225518687. The reversal of 225518669 is 966815522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160909225 + 64609444 = 12685^2 + 8038^2 .

It is a cyclic number.

It is not a de Polignac number, because 225518669 - 2⁴ = 225518653 is a prime.

It is a super-2 number, since 2×225518669² = 101717340135063122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225518609) 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, 112759334 + 112759335.

It is an arithmetic number, because the mean of its divisors is an integer number (112759335).

Almost surely, 2^225518669 is an apocalyptic number.

It is an amenable number.

225518669 is a deficient number, since it is larger than the sum of its proper divisors (1).

225518669 is an equidigital number, since it uses as much as digits as its factorization.

225518669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 44.

The square root of 225518669 is about 15017.2790145219. The cubic root of 225518669 is about 608.6871964015.

The spelling of 225518669 in words is "two hundred twenty-five million, five hundred eighteen thousand, six hundred sixty-nine".