56554213 has 2 divisors, whose sum is σ = 56554214. Its totient is φ = 56554212.

The previous prime is 56554151. The next prime is 56554237. The reversal of 56554213 is 31245565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39727809 + 16826404 = 6303^2 + 4102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56554213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56557213) 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, 28277106 + 28277107.

It is an arithmetic number, because the mean of its divisors is an integer number (28277107).

Almost surely, 2^56554213 is an apocalyptic number.

It is an amenable number.

56554213 is a deficient number, since it is larger than the sum of its proper divisors (1).

56554213 is an equidigital number, since it uses as much as digits as its factorization.

56554213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 31.

The square root of 56554213 is about 7520.2535196628. The cubic root of 56554213 is about 383.8442044681.

Adding to 56554213 its reverse (31245565), we get a palindrome (87799778).

The spelling of 56554213 in words is "fifty-six million, five hundred fifty-four thousand, two hundred thirteen".