212320453 has 2 divisors, whose sum is σ = 212320454. Its totient is φ = 212320452.

The previous prime is 212320417. The next prime is 212320469. The reversal of 212320453 is 354023212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193293409 + 19027044 = 13903^2 + 4362^2 .

It is a cyclic number.

It is not a de Polignac number, because 212320453 - 2¹⁷ = 212189381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212320403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160226 + 106160227.

It is an arithmetic number, because the mean of its divisors is an integer number (106160227).

Almost surely, 2^212320453 is an apocalyptic number.

It is an amenable number.

212320453 is a deficient number, since it is larger than the sum of its proper divisors (1).

212320453 is an equidigital number, since it uses as much as digits as its factorization.

212320453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 212320453 is about 14571.2200244180. The cubic root of 212320453 is about 596.5734808993.

Adding to 212320453 its reverse (354023212), we get a palindrome (566343665).

The spelling of 212320453 in words is "two hundred twelve million, three hundred twenty thousand, four hundred fifty-three".