56551613 has 2 divisors, whose sum is σ = 56551614. Its totient is φ = 56551612.

The previous prime is 56551589. The next prime is 56551699. The reversal of 56551613 is 31615565.

56551613 = 5317² + 5318².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28281124 + 28270489 = 5318^2 + 5317^2 .

It is a cyclic number.

It is not a de Polignac number, because 56551613 - 2⁸ = 56551357 is a prime.

It is a Chen prime.

It is equal to p_3369218 and since 56551613 and 3369218 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56551613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56551513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28275806 + 28275807.

It is an arithmetic number, because the mean of its divisors is an integer number (28275807).

Almost surely, 2^56551613 is an apocalyptic number.

56551613 is the 5318-th centered square number.

It is an amenable number.

56551613 is a deficient number, since it is larger than the sum of its proper divisors (1).

56551613 is an equidigital number, since it uses as much as digits as its factorization.

56551613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 32.

The square root of 56551613 is about 7520.0806511633. The cubic root of 56551613 is about 383.8383221464.

The spelling of 56551613 in words is "fifty-six million, five hundred fifty-one thousand, six hundred thirteen".