57256013 has 2 divisors, whose sum is σ = 57256014. Its totient is φ = 57256012.

The previous prime is 57256007. The next prime is 57256027. The reversal of 57256013 is 31065275.

57256013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28761769 + 28494244 = 5363^2 + 5338^2 .

It is a cyclic number.

It is not a de Polignac number, because 57256013 - 2¹² = 57251917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57256813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28628006 + 28628007.

It is an arithmetic number, because the mean of its divisors is an integer number (28628007).

Almost surely, 2^57256013 is an apocalyptic number.

It is an amenable number.

57256013 is a deficient number, since it is larger than the sum of its proper divisors (1).

57256013 is an equidigital number, since it uses as much as digits as its factorization.

57256013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 57256013 is about 7566.7703150023. The cubic root of 57256013 is about 385.4254317805.

The spelling of 57256013 in words is "fifty-seven million, two hundred fifty-six thousand, thirteen".