212243459 has 2 divisors, whose sum is σ = 212243460. Its totient is φ = 212243458.

The previous prime is 212243413. The next prime is 212243467. The reversal of 212243459 is 954342212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212243459 - 2¹⁶ = 212177923 is a prime.

It is not a weakly prime, because it can be changed into another prime (212243159) 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, 106121729 + 106121730.

It is an arithmetic number, because the mean of its divisors is an integer number (106121730).

Almost surely, 2^212243459 is an apocalyptic number.

212243459 is a deficient number, since it is larger than the sum of its proper divisors (1).

212243459 is an equidigital number, since it uses as much as digits as its factorization.

212243459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 212243459 is about 14568.5777960651. The cubic root of 212243459 is about 596.5013601477.

The spelling of 212243459 in words is "two hundred twelve million, two hundred forty-three thousand, four hundred fifty-nine".