56543813 has 2 divisors, whose sum is σ = 56543814. Its totient is φ = 56543812.

The previous prime is 56543759. The next prime is 56543827. The reversal of 56543813 is 31834565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38962564 + 17581249 = 6242^2 + 4193^2 .

It is a cyclic number.

It is not a de Polignac number, because 56543813 - 2¹⁰ = 56542789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56543863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28271906 + 28271907.

It is an arithmetic number, because the mean of its divisors is an integer number (28271907).

Almost surely, 2^56543813 is an apocalyptic number.

It is an amenable number.

56543813 is a deficient number, since it is larger than the sum of its proper divisors (1).

56543813 is an equidigital number, since it uses as much as digits as its factorization.

56543813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 56543813 is about 7519.5620218202. The cubic root of 56543813 is about 383.8206740994.

The spelling of 56543813 in words is "fifty-six million, five hundred forty-three thousand, eight hundred thirteen".