57520013 has 2 divisors, whose sum is σ = 57520014. Its totient is φ = 57520012.

The previous prime is 57520009. The next prime is 57520037. The reversal of 57520013 is 31002575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 6568969 = 7138^2 + 2563^2 .

It is a cyclic number.

It is not a de Polignac number, because 57520013 - 2² = 57520009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57520093) 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, 28760006 + 28760007.

It is an arithmetic number, because the mean of its divisors is an integer number (28760007).

Almost surely, 2^57520013 is an apocalyptic number.

It is an amenable number.

57520013 is a deficient number, since it is larger than the sum of its proper divisors (1).

57520013 is an equidigital number, since it uses as much as digits as its factorization.

57520013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 57520013 is about 7584.1949473889. The cubic root of 57520013 is about 386.0169057537.

Adding to 57520013 its reverse (31002575), we get a palindrome (88522588).

The spelling of 57520013 in words is "fifty-seven million, five hundred twenty thousand, thirteen".