212238311 has 2 divisors, whose sum is σ = 212238312. Its totient is φ = 212238310.

The previous prime is 212238289. The next prime is 212238329. The reversal of 212238311 is 113832212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212238311 - 2¹⁰ = 212237287 is a prime.

It is a super-2 number, since 2×212238311² = 90090201312265442, 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 (212238361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106119155 + 106119156.

It is an arithmetic number, because the mean of its divisors is an integer number (106119156).

Almost surely, 2^212238311 is an apocalyptic number.

212238311 is a deficient number, since it is larger than the sum of its proper divisors (1).

212238311 is an equidigital number, since it uses as much as digits as its factorization.

212238311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 212238311 is about 14568.4011133686. The cubic root of 212238311 is about 596.4965373626.

The spelling of 212238311 in words is "two hundred twelve million, two hundred thirty-eight thousand, three hundred eleven".