505212343 has 2 divisors, whose sum is σ = 505212344. Its totient is φ = 505212342.

The previous prime is 505212329. The next prime is 505212391. The reversal of 505212343 is 343212505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505212343 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505212313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252606171 + 252606172.

It is an arithmetic number, because the mean of its divisors is an integer number (252606172).

Almost surely, 2^505212343 is an apocalyptic number.

505212343 is a deficient number, since it is larger than the sum of its proper divisors (1).

505212343 is an equidigital number, since it uses as much as digits as its factorization.

505212343 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 505212343 is about 22476.9291274409. The cubic root of 505212343 is about 796.4490235073.

Adding to 505212343 its reverse (343212505), we get a palindrome (848424848).

The spelling of 505212343 in words is "five hundred five million, two hundred twelve thousand, three hundred forty-three".