504315521 has 2 divisors, whose sum is σ = 504315522. Its totient is φ = 504315520.

The previous prime is 504315517. The next prime is 504315527. The reversal of 504315521 is 125513405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372065521 + 132250000 = 19289^2 + 11500^2 .

It is a cyclic number.

It is not a de Polignac number, because 504315521 - 2² = 504315517 is a prime.

It is not a weakly prime, because it can be changed into another prime (504315527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252157760 + 252157761.

It is an arithmetic number, because the mean of its divisors is an integer number (252157761).

Almost surely, 2^504315521 is an apocalyptic number.

It is an amenable number.

504315521 is a deficient number, since it is larger than the sum of its proper divisors (1).

504315521 is an equidigital number, since it uses as much as digits as its factorization.

504315521 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 26.

The square root of 504315521 is about 22456.9704323624. The cubic root of 504315521 is about 795.9774752050.

Adding to 504315521 its reverse (125513405), we get a palindrome (629828926).

The spelling of 504315521 in words is "five hundred four million, three hundred fifteen thousand, five hundred twenty-one".