212262209 has 2 divisors, whose sum is σ = 212262210. Its totient is φ = 212262208.

The previous prime is 212262203. The next prime is 212262217. The reversal of 212262209 is 902262212.

212262209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127622209 + 84640000 = 11297^2 + 9200^2 .

It is a cyclic number.

It is not a de Polignac number, because 212262209 - 2⁸ = 212261953 is a prime.

It is not a weakly prime, because it can be changed into another prime (212262203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106131104 + 106131105.

It is an arithmetic number, because the mean of its divisors is an integer number (106131105).

Almost surely, 2^212262209 is an apocalyptic number.

It is an amenable number.

212262209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212262209 is an equidigital number, since it uses as much as digits as its factorization.

212262209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 212262209 is about 14569.2212901033. The cubic root of 212262209 is about 596.5189249940.

The spelling of 212262209 in words is "two hundred twelve million, two hundred sixty-two thousand, two hundred nine".