224653661 has 2 divisors, whose sum is σ = 224653662. Its totient is φ = 224653660.

The previous prime is 224653523. The next prime is 224653679. The reversal of 224653661 is 166356422.

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., 194072761 + 30580900 = 13931^2 + 5530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224653661 is a prime.

It is equal to p_12364919 and since 224653661 and 12364919 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224656661) 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, 112326830 + 112326831.

It is an arithmetic number, because the mean of its divisors is an integer number (112326831).

Almost surely, 2^224653661 is an apocalyptic number.

It is an amenable number.

224653661 is a deficient number, since it is larger than the sum of its proper divisors (1).

224653661 is an equidigital number, since it uses as much as digits as its factorization.

224653661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 35.

The square root of 224653661 is about 14988.4509206255. The cubic root of 224653661 is about 607.9079646657.

The spelling of 224653661 in words is "two hundred twenty-four million, six hundred fifty-three thousand, six hundred sixty-one".