505241251 has 2 divisors, whose sum is σ = 505241252. Its totient is φ = 505241250.

The previous prime is 505241227. The next prime is 505241263. The reversal of 505241251 is 152142505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505241251 - 2⁷ = 505241123 is a prime.

It is not a weakly prime, because it can be changed into another prime (505241221) 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, 252620625 + 252620626.

It is an arithmetic number, because the mean of its divisors is an integer number (252620626).

Almost surely, 2^505241251 is an apocalyptic number.

505241251 is a deficient number, since it is larger than the sum of its proper divisors (1).

505241251 is an equidigital number, since it uses as much as digits as its factorization.

505241251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 505241251 is about 22477.5721776174. The cubic root of 505241251 is about 796.4642140238.

Adding to 505241251 its reverse (152142505), we get a palindrome (657383756).

The spelling of 505241251 in words is "five hundred five million, two hundred forty-one thousand, two hundred fifty-one".