56304513 has 6 divisors (see below), whose sum is σ = 81328754. Its totient is φ = 37536336.

The previous prime is 56304511. The next prime is 56304533. The reversal of 56304513 is 31540365.

It can be written as a sum of positive squares in only one way, i.e., 52664049 + 3640464 = 7257^2 + 1908^2 .

It is not a de Polignac number, because 56304513 - 2¹ = 56304511 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56304511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3128020 + ... + 3128037.

Almost surely, 2^56304513 is an apocalyptic number.

It is an amenable number.

56304513 is a deficient number, since it is larger than the sum of its proper divisors (25024241).

56304513 is a wasteful number, since it uses less digits than its factorization.

56304513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6256063 (or 6256060 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 56304513 is about 7503.6333199324. The cubic root of 56304513 is about 383.2784505338.

Adding to 56304513 its reverse (31540365), we get a palindrome (87844878).

The spelling of 56304513 in words is "fifty-six million, three hundred four thousand, five hundred thirteen".