212277229 has 2 divisors, whose sum is σ = 212277230. Its totient is φ = 212277228.

The previous prime is 212277227. The next prime is 212277257. The reversal of 212277229 is 922772212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205148329 + 7128900 = 14323^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 212277229 - 2¹ = 212277227 is a prime.

Together with 212277227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 212277194 and 212277203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212277227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106138614 + 106138615.

It is an arithmetic number, because the mean of its divisors is an integer number (106138615).

Almost surely, 2^212277229 is an apocalyptic number.

It is an amenable number.

212277229 is a deficient number, since it is larger than the sum of its proper divisors (1).

212277229 is an equidigital number, since it uses as much as digits as its factorization.

212277229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 212277229 is about 14569.7367512251. The cubic root of 212277229 is about 596.5329948606.

The spelling of 212277229 in words is "two hundred twelve million, two hundred seventy-seven thousand, two hundred twenty-nine".