56005613 has 2 divisors, whose sum is σ = 56005614. Its totient is φ = 56005612.

The previous prime is 56005601. The next prime is 56005627. The reversal of 56005613 is 31650065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35010889 + 20994724 = 5917^2 + 4582^2 .

It is a cyclic number.

It is not a de Polignac number, because 56005613 - 2⁸ = 56005357 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56005643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28002806 + 28002807.

It is an arithmetic number, because the mean of its divisors is an integer number (28002807).

Almost surely, 2^56005613 is an apocalyptic number.

It is an amenable number.

56005613 is a deficient number, since it is larger than the sum of its proper divisors (1).

56005613 is an equidigital number, since it uses as much as digits as its factorization.

56005613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 56005613 is about 7483.6897984884. The cubic root of 56005613 is about 382.5990186069.

Adding to 56005613 its reverse (31650065), we get a palindrome (87655678).

The spelling of 56005613 in words is "fifty-six million, five thousand, six hundred thirteen".