505303243 has 2 divisors, whose sum is σ = 505303244. Its totient is φ = 505303242.

The previous prime is 505303231. The next prime is 505303283. The reversal of 505303243 is 342303505.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505303243 - 2²¹ = 503206091 is a prime.

It is not a weakly prime, because it can be changed into another prime (505303283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252651621 + 252651622.

It is an arithmetic number, because the mean of its divisors is an integer number (252651622).

Almost surely, 2^505303243 is an apocalyptic number.

505303243 is a deficient number, since it is larger than the sum of its proper divisors (1).

505303243 is an equidigital number, since it uses as much as digits as its factorization.

505303243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 505303243 is about 22478.9511098717. The cubic root of 505303243 is about 796.4967874992.

Adding to 505303243 its reverse (342303505), we get a palindrome (847606748).

The spelling of 505303243 in words is "five hundred five million, three hundred three thousand, two hundred forty-three".