102030217 has 2 divisors, whose sum is σ = 102030218. Its totient is φ = 102030216.

The previous prime is 102030193. The next prime is 102030233. The reversal of 102030217 is 712030201.

It is a happy number.

It is an a-pointer prime, because the next prime (102030233) can be obtained adding 102030217 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102030201 + 16 = 10101^2 + 4^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102030217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102030217.

It is not a weakly prime, because it can be changed into another prime (102030287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51015108 + 51015109.

It is an arithmetic number, because the mean of its divisors is an integer number (51015109).

Almost surely, 2^102030217 is an apocalyptic number.

It is an amenable number.

102030217 is a deficient number, since it is larger than the sum of its proper divisors (1).

102030217 is an equidigital number, since it uses as much as digits as its factorization.

102030217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 102030217 is about 10101.0007920008. Note that the first 3 decimals coincide. The cubic root of 102030217 is about 467.2790067629.

Subtracting from 102030217 its sum of digits (16), we obtain a palindrome (102030201).

Adding to 102030217 its reverse (712030201), we get a palindrome (814060418).

The spelling of 102030217 in words is "one hundred two million, thirty thousand, two hundred seventeen".