501513013 has 2 divisors, whose sum is σ = 501513014. Its totient is φ = 501513012.

The previous prime is 501513011. The next prime is 501513017. The reversal of 501513013 is 310315105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501446449 + 66564 = 22393^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 501513013 - 2¹ = 501513011 is a prime.

Together with 501513011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501513011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250756506 + 250756507.

It is an arithmetic number, because the mean of its divisors is an integer number (250756507).

Almost surely, 2^501513013 is an apocalyptic number.

It is an amenable number.

501513013 is a deficient number, since it is larger than the sum of its proper divisors (1).

501513013 is an equidigital number, since it uses as much as digits as its factorization.

501513013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 501513013 is about 22394.4862187102. The cubic root of 501513013 is about 794.5003059500.

Adding to 501513013 its reverse (310315105), we get a palindrome (811828118).

The spelling of 501513013 in words is "five hundred one million, five hundred thirteen thousand, thirteen".