505211243 has 2 divisors, whose sum is σ = 505211244. Its totient is φ = 505211242.

The previous prime is 505211167. The next prime is 505211249. The reversal of 505211243 is 342112505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505211243 - 2¹⁰ = 505210219 is a prime.

It is not a weakly prime, because it can be changed into another prime (505211249) 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, 252605621 + 252605622.

It is an arithmetic number, because the mean of its divisors is an integer number (252605622).

Almost surely, 2^505211243 is an apocalyptic number.

505211243 is a deficient number, since it is larger than the sum of its proper divisors (1).

505211243 is an equidigital number, since it uses as much as digits as its factorization.

505211243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 505211243 is about 22476.9046578927. The cubic root of 505211243 is about 796.4484454701.

Adding to 505211243 its reverse (342112505), we get a palindrome (847323748).

The spelling of 505211243 in words is "five hundred five million, two hundred eleven thousand, two hundred forty-three".