501313513 has 2 divisors, whose sum is σ = 501313514. Its totient is φ = 501313512.

The previous prime is 501313487. The next prime is 501313523. The reversal of 501313513 is 315313105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432307264 + 69006249 = 20792^2 + 8307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501313513 is a prime.

It is not a weakly prime, because it can be changed into another prime (501313523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250656756 + 250656757.

It is an arithmetic number, because the mean of its divisors is an integer number (250656757).

Almost surely, 2^501313513 is an apocalyptic number.

It is an amenable number.

501313513 is a deficient number, since it is larger than the sum of its proper divisors (1).

501313513 is an equidigital number, since it uses as much as digits as its factorization.

501313513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 501313513 is about 22390.0315542431. The cubic root of 501313513 is about 794.3949422281.

Adding to 501313513 its reverse (315313105), we get a palindrome (816626618).

The spelling of 501313513 in words is "five hundred one million, three hundred thirteen thousand, five hundred thirteen".