56217529 has 2 divisors, whose sum is σ = 56217530. Its totient is φ = 56217528.

The previous prime is 56217527. The next prime is 56217563. The reversal of 56217529 is 92571265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28676025 + 27541504 = 5355^2 + 5248^2 .

It is a cyclic number.

It is not a de Polignac number, because 56217529 - 2¹ = 56217527 is a prime.

Together with 56217527, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56217527) 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, 28108764 + 28108765.

It is an arithmetic number, because the mean of its divisors is an integer number (28108765).

Almost surely, 2^56217529 is an apocalyptic number.

It is an amenable number.

56217529 is a deficient number, since it is larger than the sum of its proper divisors (1).

56217529 is an equidigital number, since it uses as much as digits as its factorization.

56217529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 56217529 is about 7497.8349541718. The cubic root of 56217529 is about 383.0809750913.

The spelling of 56217529 in words is "fifty-six million, two hundred seventeen thousand, five hundred twenty-nine".