228576005076721 has 2 divisors, whose sum is σ = 228576005076722. Its totient is φ = 228576005076720.

The previous prime is 228576005076623. The next prime is 228576005076767. The reversal of 228576005076721 is 127670500675822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138600915406321 + 89975089670400 = 11772889^2 + 9485520^2 .

It is a cyclic number.

It is not a de Polignac number, because 228576005076721 - 2¹¹ = 228576005074673 is a prime.

It is a super-2 number, since 2×228576005076721² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (228576005071721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114288002538360 + 114288002538361.

It is an arithmetic number, because the mean of its divisors is an integer number (114288002538361).

Almost surely, 2^{228576005076721} is an apocalyptic number.

It is an amenable number.

228576005076721 is a deficient number, since it is larger than the sum of its proper divisors (1).

228576005076721 is an equidigital number, since it uses as much as digits as its factorization.

228576005076721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19756800, while the sum is 58.

The spelling of 228576005076721 in words is "two hundred twenty-eight trillion, five hundred seventy-six billion, five million, seventy-six thousand, seven hundred twenty-one".