505225243 has 2 divisors, whose sum is σ = 505225244. Its totient is φ = 505225242.

The previous prime is 505225169. The next prime is 505225277. The reversal of 505225243 is 342522505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505225243 is a prime.

It is not a weakly prime, because it can be changed into another prime (505225283) 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, 252612621 + 252612622.

It is an arithmetic number, because the mean of its divisors is an integer number (252612622).

Almost surely, 2^505225243 is an apocalyptic number.

505225243 is a deficient number, since it is larger than the sum of its proper divisors (1).

505225243 is an equidigital number, since it uses as much as digits as its factorization.

505225243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 505225243 is about 22477.2160865175. The cubic root of 505225243 is about 796.4558022444.

Adding to 505225243 its reverse (342522505), we get a palindrome (847747748).

The spelling of 505225243 in words is "five hundred five million, two hundred twenty-five thousand, two hundred forty-three".