212822317 has 2 divisors, whose sum is σ = 212822318. Its totient is φ = 212822316.

The previous prime is 212822299. The next prime is 212822321. The reversal of 212822317 is 713228212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165405321 + 47416996 = 12861^2 + 6886^2 .

It is a cyclic number.

It is not a de Polignac number, because 212822317 - 2¹¹ = 212820269 is a prime.

It is a super-2 number, since 2×212822317² = 90586677226496978, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212822377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106411158 + 106411159.

It is an arithmetic number, because the mean of its divisors is an integer number (106411159).

Almost surely, 2^212822317 is an apocalyptic number.

It is an amenable number.

212822317 is a deficient number, since it is larger than the sum of its proper divisors (1).

212822317 is an equidigital number, since it uses as much as digits as its factorization.

212822317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 212822317 is about 14588.4309300212. The cubic root of 212822317 is about 597.0431532918.

The spelling of 212822317 in words is "two hundred twelve million, eight hundred twenty-two thousand, three hundred seventeen".