30221875217 has 2 divisors, whose sum is σ = 30221875218. Its totient is φ = 30221875216.

The previous prime is 30221875157. The next prime is 30221875259. The reversal of 30221875217 is 71257812203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24125544976 + 6096330241 = 155324^2 + 78079^2 .

It is a cyclic number.

It is not a de Polignac number, because 30221875217 - 2⁸ = 30221874961 is a prime.

It is not a weakly prime, because it can be changed into another prime (30221805217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110937608 + 15110937609.

It is an arithmetic number, because the mean of its divisors is an integer number (15110937609).

Almost surely, 2^30221875217 is an apocalyptic number.

It is an amenable number.

30221875217 is a deficient number, since it is larger than the sum of its proper divisors (1).

30221875217 is an equidigital number, since it uses as much as digits as its factorization.

30221875217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 30221875217 in words is "thirty billion, two hundred twenty-one million, eight hundred seventy-five thousand, two hundred seventeen".