212143241 has 2 divisors, whose sum is σ = 212143242. Its totient is φ = 212143240.

The previous prime is 212143147. The next prime is 212143271. The reversal of 212143241 is 142341212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166513216 + 45630025 = 12904^2 + 6755^2 .

It is a cyclic number.

It is not a de Polignac number, because 212143241 - 2¹⁴ = 212126857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212143271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106071620 + 106071621.

It is an arithmetic number, because the mean of its divisors is an integer number (106071621).

Almost surely, 2^212143241 is an apocalyptic number.

It is an amenable number.

212143241 is a deficient number, since it is larger than the sum of its proper divisors (1).

212143241 is an equidigital number, since it uses as much as digits as its factorization.

212143241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 212143241 is about 14565.1378640918. The cubic root of 212143241 is about 596.4074592016.

Adding to 212143241 its reverse (142341212), we get a palindrome (354484453).

The spelling of 212143241 in words is "two hundred twelve million, one hundred forty-three thousand, two hundred forty-one".