28228011520229 has 2 divisors, whose sum is σ = 28228011520230. Its totient is φ = 28228011520228.

The previous prime is 28228011520217. The next prime is 28228011520309. The reversal of 28228011520229 is 92202511082282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22255730889604 + 5972280630625 = 4717598^2 + 2443825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28228011520229 is a prime.

It is a super-2 number, since 2×28228011520229² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28228011520229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28228011528229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114005760114 + 14114005760115.

It is an arithmetic number, because the mean of its divisors is an integer number (14114005760115).

Almost surely, 2^{28228011520229} is an apocalyptic number.

It is an amenable number.

28228011520229 is a deficient number, since it is larger than the sum of its proper divisors (1).

28228011520229 is an equidigital number, since it uses as much as digits as its factorization.

28228011520229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 28228011520229 in words is "twenty-eight trillion, two hundred twenty-eight billion, eleven million, five hundred twenty thousand, two hundred twenty-nine".