504345521 has 2 divisors, whose sum is σ = 504345522. Its totient is φ = 504345520.

The previous prime is 504345473. The next prime is 504345571. The reversal of 504345521 is 125543405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 386319025 + 118026496 = 19655^2 + 10864^2 .

It is a cyclic number.

It is not a de Polignac number, because 504345521 - 2¹⁰ = 504344497 is a prime.

It is a super-2 number, since 2×504345521² = 508728809105522882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (504345571) 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, 252172760 + 252172761.

It is an arithmetic number, because the mean of its divisors is an integer number (252172761).

Almost surely, 2^504345521 is an apocalyptic number.

It is an amenable number.

504345521 is a deficient number, since it is larger than the sum of its proper divisors (1).

504345521 is an equidigital number, since it uses as much as digits as its factorization.

504345521 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 29.

The square root of 504345521 is about 22457.6383664890. The cubic root of 504345521 is about 795.9932582150.

Adding to 504345521 its reverse (125543405), we get a palindrome (629888926).

It can be divided in two parts, 50434 and 5521, that added together give a palindrome (55955).

The spelling of 504345521 in words is "five hundred four million, three hundred forty-five thousand, five hundred twenty-one".