505204481 has 2 divisors, whose sum is σ = 505204482. Its totient is φ = 505204480.

The previous prime is 505204417. The next prime is 505204507. The reversal of 505204481 is 184402505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394618225 + 110586256 = 19865^2 + 10516^2 .

It is a cyclic number.

It is not a de Polignac number, because 505204481 - 2⁶ = 505204417 is a prime.

It is a super-2 number, since 2×505204481² = 510463135244958722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505204411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252602240 + 252602241.

It is an arithmetic number, because the mean of its divisors is an integer number (252602241).

Almost surely, 2^505204481 is an apocalyptic number.

It is an amenable number.

505204481 is a deficient number, since it is larger than the sum of its proper divisors (1).

505204481 is an equidigital number, since it uses as much as digits as its factorization.

505204481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 505204481 is about 22476.7542363216. The cubic root of 505204481 is about 796.4448920995. Note that the first 3 decimals are identical.

Adding to 505204481 its reverse (184402505), we get a palindrome (689606986).

The spelling of 505204481 in words is "five hundred five million, two hundred four thousand, four hundred eighty-one".