212316331 has 2 divisors, whose sum is σ = 212316332. Its totient is φ = 212316330.

The previous prime is 212316329. The next prime is 212316373. The reversal of 212316331 is 133613212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212316331 - 2¹ = 212316329 is a prime.

It is a super-2 number, since 2×212316331² = 90156448818603122, which contains 22 as substring.

Together with 212316329, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212316301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106158165 + 106158166.

It is an arithmetic number, because the mean of its divisors is an integer number (106158166).

Almost surely, 2^212316331 is an apocalyptic number.

212316331 is a deficient number, since it is larger than the sum of its proper divisors (1).

212316331 is an equidigital number, since it uses as much as digits as its factorization.

212316331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

The square root of 212316331 is about 14571.0785805307. The cubic root of 212316331 is about 596.5696202384.

Adding to 212316331 its reverse (133613212), we get a palindrome (345929543).

The spelling of 212316331 in words is "two hundred twelve million, three hundred sixteen thousand, three hundred thirty-one".