212334281 has 2 divisors, whose sum is σ = 212334282. Its totient is φ = 212334280.

The previous prime is 212334277. The next prime is 212334313. The reversal of 212334281 is 182433212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171374281 + 40960000 = 13091^2 + 6400^2 .

It is a cyclic number.

It is not a de Polignac number, because 212334281 - 2² = 212334277 is a prime.

It is a super-2 number, since 2×212334281² = 90171693775573922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212334281.

It is not a weakly prime, because it can be changed into another prime (212334181) 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, 106167140 + 106167141.

It is an arithmetic number, because the mean of its divisors is an integer number (106167141).

Almost surely, 2^212334281 is an apocalyptic number.

It is an amenable number.

212334281 is a deficient number, since it is larger than the sum of its proper divisors (1).

212334281 is an equidigital number, since it uses as much as digits as its factorization.

212334281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 212334281 is about 14571.6945136796. The cubic root of 212334281 is about 596.5864318246.

Adding to 212334281 its reverse (182433212), we get a palindrome (394767493).

The spelling of 212334281 in words is "two hundred twelve million, three hundred thirty-four thousand, two hundred eighty-one".