212345503 has 2 divisors, whose sum is σ = 212345504. Its totient is φ = 212345502.

The previous prime is 212345491. The next prime is 212345509. The reversal of 212345503 is 305543212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212345503 - 2²¹ = 210248351 is a prime.

It is a super-2 number, since 2×212345503² = 90181225288646018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212345509) 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, 106172751 + 106172752.

It is an arithmetic number, because the mean of its divisors is an integer number (106172752).

Almost surely, 2^212345503 is an apocalyptic number.

212345503 is a deficient number, since it is larger than the sum of its proper divisors (1).

212345503 is an equidigital number, since it uses as much as digits as its factorization.

212345503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 212345503 is about 14572.0795701918. The cubic root of 212345503 is about 596.5969416286.

Adding to 212345503 its reverse (305543212), we get a palindrome (517888715).

The spelling of 212345503 in words is "two hundred twelve million, three hundred forty-five thousand, five hundred three".