56521305 has 12 divisors (see below), whose sum is σ = 97970340. Its totient is φ = 30144672.

The previous prime is 56521291. The next prime is 56521331. The reversal of 56521305 is 50312565.

56521305 is a `hidden beast` number, since 5 + 652 + 1 + 3 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30603024 + 25918281 = 5532^2 + 5091^2 .

It is not a de Polignac number, because 56521305 - 2⁷ = 56521177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 627970 + ... + 628059.

It is an arithmetic number, because the mean of its divisors is an integer number (8164195).

Almost surely, 2^56521305 is an apocalyptic number.

It is an amenable number.

56521305 is a deficient number, since it is larger than the sum of its proper divisors (41449035).

56521305 is a wasteful number, since it uses less digits than its factorization.

56521305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256040 (or 1256037 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 56521305 is about 7518.0652431327. The cubic root of 56521305 is about 383.7697390703.

The spelling of 56521305 in words is "fifty-six million, five hundred twenty-one thousand, three hundred five".