212245417 has 2 divisors, whose sum is σ = 212245418. Its totient is φ = 212245416.

The previous prime is 212245387. The next prime is 212245457. The reversal of 212245417 is 714542212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106998336 + 105247081 = 10344^2 + 10259^2 .

It is a cyclic number.

It is not a de Polignac number, because 212245417 - 2²⁷ = 78027689 is a prime.

It is a Chen prime.

It is equal to p_11718640 and since 212245417 and 11718640 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (212245457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106122708 + 106122709.

It is an arithmetic number, because the mean of its divisors is an integer number (106122709).

Almost surely, 2^212245417 is an apocalyptic number.

It is an amenable number.

212245417 is a deficient number, since it is larger than the sum of its proper divisors (1).

212245417 is an equidigital number, since it uses as much as digits as its factorization.

212245417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 28.

The square root of 212245417 is about 14568.6449953316. The cubic root of 212245417 is about 596.5031944345.

Adding to 212245417 its reverse (714542212), we get a palindrome (926787629).

The spelling of 212245417 in words is "two hundred twelve million, two hundred forty-five thousand, four hundred seventeen".