226299716821 has 2 divisors, whose sum is σ = 226299716822. Its totient is φ = 226299716820.

The previous prime is 226299716791. The next prime is 226299716843. The reversal of 226299716821 is 128617992622.

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., 220161777796 + 6137939025 = 469214^2 + 78345^2 .

It is a cyclic number.

It is not a de Polignac number, because 226299716821 - 2¹⁹ = 226299192533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226299716021) 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, 113149858410 + 113149858411.

It is an arithmetic number, because the mean of its divisors is an integer number (113149858411).

Almost surely, 2^226299716821 is an apocalyptic number.

It is an amenable number.

226299716821 is a deficient number, since it is larger than the sum of its proper divisors (1).

226299716821 is an equidigital number, since it uses as much as digits as its factorization.

226299716821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The spelling of 226299716821 in words is "two hundred twenty-six billion, two hundred ninety-nine million, seven hundred sixteen thousand, eight hundred twenty-one".