212244407 has 2 divisors, whose sum is σ = 212244408. Its totient is φ = 212244406.

The previous prime is 212244379. The next prime is 212244449. The reversal of 212244407 is 704442212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212244407 - 2²⁴ = 195467191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212244607) 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, 106122203 + 106122204.

It is an arithmetic number, because the mean of its divisors is an integer number (106122204).

Almost surely, 2^212244407 is an apocalyptic number.

212244407 is a deficient number, since it is larger than the sum of its proper divisors (1).

212244407 is an equidigital number, since it uses as much as digits as its factorization.

212244407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 212244407 is about 14568.6103318058. The cubic root of 212244407 is about 596.5022482512.

Adding to 212244407 its reverse (704442212), we get a palindrome (916686619).

The spelling of 212244407 in words is "two hundred twelve million, two hundred forty-four thousand, four hundred seven".