56803513 has 4 divisors (see below), whose sum is σ = 61173028. Its totient is φ = 52434000.

The previous prime is 56803507. The next prime is 56803519. The reversal of 56803513 is 31530865.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31530865 = 5 ⋅6306173.

It is an interprime number because it is at equal distance from previous prime (56803507) and next prime (56803519).

It can be written as a sum of positive squares in 2 ways, for example, as 20358144 + 36445369 = 4512^2 + 6037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56803513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56803519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2184738 + ... + 2184763.

It is an arithmetic number, because the mean of its divisors is an integer number (15293257).

Almost surely, 2^56803513 is an apocalyptic number.

It is an amenable number.

56803513 is a deficient number, since it is larger than the sum of its proper divisors (4369515).

56803513 is a wasteful number, since it uses less digits than its factorization.

56803513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4369514.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 56803513 is about 7536.8105323141. The cubic root of 56803513 is about 384.4073932468.

The spelling of 56803513 in words is "fifty-six million, eight hundred three thousand, five hundred thirteen".