210013217 has 2 divisors, whose sum is σ = 210013218. Its totient is φ = 210013216.

The previous prime is 210013201. The next prime is 210013231. The reversal of 210013217 is 712310012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202663696 + 7349521 = 14236^2 + 2711^2 .

It is a cyclic number.

It is not a de Polignac number, because 210013217 - 2⁴ = 210013201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210013195 and 210013204.

It is not a weakly prime, because it can be changed into another prime (210013267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105006608 + 105006609.

It is an arithmetic number, because the mean of its divisors is an integer number (105006609).

Almost surely, 2^210013217 is an apocalyptic number.

It is an amenable number.

210013217 is a deficient number, since it is larger than the sum of its proper divisors (1).

210013217 is an equidigital number, since it uses as much as digits as its factorization.

210013217 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 17.

The square root of 210013217 is about 14491.8327688391. The cubic root of 210013217 is about 594.4046649856.

Adding to 210013217 its reverse (712310012), we get a palindrome (922323229).

The spelling of 210013217 in words is "two hundred ten million, thirteen thousand, two hundred seventeen".