56405513 has 2 divisors, whose sum is σ = 56405514. Its totient is φ = 56405512.

The previous prime is 56405497. The next prime is 56405521. The reversal of 56405513 is 31550465.

56405513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49603849 + 6801664 = 7043^2 + 2608^2 .

It is a cyclic number.

It is not a de Polignac number, because 56405513 - 2⁴ = 56405497 is a prime.

It is not a weakly prime, because it can be changed into another prime (56405543) 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, 28202756 + 28202757.

It is an arithmetic number, because the mean of its divisors is an integer number (28202757).

Almost surely, 2^56405513 is an apocalyptic number.

It is an amenable number.

56405513 is a deficient number, since it is larger than the sum of its proper divisors (1).

56405513 is an equidigital number, since it uses as much as digits as its factorization.

56405513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 56405513 is about 7510.3603775052. The cubic root of 56405513 is about 383.5074907864.

Adding to 56405513 its reverse (31550465), we get a palindrome (87955978).

It can be divided in two parts, 5640551 and 3, that multiplied together give a triangular number (16921653 = T₅₈₁₇).

The spelling of 56405513 in words is "fifty-six million, four hundred five thousand, five hundred thirteen".