226521303721 has 2 divisors, whose sum is σ = 226521303722. Its totient is φ = 226521303720.

The previous prime is 226521303709. The next prime is 226521303839. The reversal of 226521303721 is 127303125622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148436825625 + 78084478096 = 385275^2 + 279436^2 .

It is a cyclic number.

It is not a de Polignac number, because 226521303721 - 2¹¹ = 226521301673 is a prime.

It is not a weakly prime, because it can be changed into another prime (226521363721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113260651860 + 113260651861.

It is an arithmetic number, because the mean of its divisors is an integer number (113260651861).

Almost surely, 2^226521303721 is an apocalyptic number.

It is an amenable number.

226521303721 is a deficient number, since it is larger than the sum of its proper divisors (1).

226521303721 is an equidigital number, since it uses as much as digits as its factorization.

226521303721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 226521303721 in words is "two hundred twenty-six billion, five hundred twenty-one million, three hundred three thousand, seven hundred twenty-one".