505243051 has 2 divisors, whose sum is σ = 505243052. Its totient is φ = 505243050.

The previous prime is 505243049. The next prime is 505243061. The reversal of 505243051 is 150342505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505243051 - 2¹ = 505243049 is a prime.

Together with 505243049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (505243021) 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, 252621525 + 252621526.

It is an arithmetic number, because the mean of its divisors is an integer number (252621526).

Almost surely, 2^505243051 is an apocalyptic number.

505243051 is a deficient number, since it is larger than the sum of its proper divisors (1).

505243051 is an equidigital number, since it uses as much as digits as its factorization.

505243051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 505243051 is about 22477.6122174932. The cubic root of 505243051 is about 796.4651598649.

Adding to 505243051 its reverse (150342505), we get a palindrome (655585556).

The spelling of 505243051 in words is "five hundred five million, two hundred forty-three thousand, fifty-one".