56420513 has 2 divisors, whose sum is σ = 56420514. Its totient is φ = 56420512.

The previous prime is 56420509. The next prime is 56420537. The reversal of 56420513 is 31502465.

56420513 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., 50794129 + 5626384 = 7127^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 56420513 - 2² = 56420509 is a prime.

It is not a weakly prime, because it can be changed into another prime (56420563) 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, 28210256 + 28210257.

It is an arithmetic number, because the mean of its divisors is an integer number (28210257).

Almost surely, 2^56420513 is an apocalyptic number.

It is an amenable number.

56420513 is a deficient number, since it is larger than the sum of its proper divisors (1).

56420513 is an equidigital number, since it uses as much as digits as its factorization.

56420513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 56420513 is about 7511.3589316448. The cubic root of 56420513 is about 383.5414833414.

Adding to 56420513 its reverse (31502465), we get a palindrome (87922978).

The spelling of 56420513 in words is "fifty-six million, four hundred twenty thousand, five hundred thirteen".