224818861 has 2 divisors, whose sum is σ = 224818862. Its totient is φ = 224818860.

The previous prime is 224818843. The next prime is 224818883. The reversal of 224818861 is 168818422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167210761 + 57608100 = 12931^2 + 7590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224818861 is a prime.

It is a super-2 number, since 2×224818861² = 101087040522674642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224818801) 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, 112409430 + 112409431.

It is an arithmetic number, because the mean of its divisors is an integer number (112409431).

Almost surely, 2^224818861 is an apocalyptic number.

It is an amenable number.

224818861 is a deficient number, since it is larger than the sum of its proper divisors (1).

224818861 is an equidigital number, since it uses as much as digits as its factorization.

224818861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49152, while the sum is 40.

The square root of 224818861 is about 14993.9608176092. The cubic root of 224818861 is about 608.0569373689.

The spelling of 224818861 in words is "two hundred twenty-four million, eight hundred eighteen thousand, eight hundred sixty-one".