212443001 has 2 divisors, whose sum is σ = 212443002. Its totient is φ = 212443000.

The previous prime is 212442991. The next prime is 212443057. The reversal of 212443001 is 100344212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190578025 + 21864976 = 13805^2 + 4676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212443001 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212443061) 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, 106221500 + 106221501.

It is an arithmetic number, because the mean of its divisors is an integer number (106221501).

Almost surely, 2^212443001 is an apocalyptic number.

It is an amenable number.

212443001 is a deficient number, since it is larger than the sum of its proper divisors (1).

212443001 is an equidigital number, since it uses as much as digits as its factorization.

212443001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212443001 is about 14575.4245564237. The cubic root of 212443001 is about 596.6882364094.

Adding to 212443001 its reverse (100344212), we get a palindrome (312787213).

The spelling of 212443001 in words is "two hundred twelve million, four hundred forty-three thousand, one".