223335661 has 2 divisors, whose sum is σ = 223335662. Its totient is φ = 223335660.

The previous prime is 223335611. The next prime is 223335703. The reversal of 223335661 is 166533322.

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., 218862436 + 4473225 = 14794^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 223335661 - 2¹⁷ = 223204589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223335611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111667830 + 111667831.

It is an arithmetic number, because the mean of its divisors is an integer number (111667831).

Almost surely, 2^223335661 is an apocalyptic number.

It is an amenable number.

223335661 is a deficient number, since it is larger than the sum of its proper divisors (1).

223335661 is an equidigital number, since it uses as much as digits as its factorization.

223335661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 31.

The square root of 223335661 is about 14944.4190586319. The cubic root of 223335661 is about 606.7168056549.

Adding to 223335661 its reverse (166533322), we get a palindrome (389868983).

The spelling of 223335661 in words is "two hundred twenty-three million, three hundred thirty-five thousand, six hundred sixty-one".