55728163 has 2 divisors, whose sum is σ = 55728164. Its totient is φ = 55728162.

The previous prime is 55728161. The next prime is 55728181. The reversal of 55728163 is 36182755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55728163 - 2¹ = 55728161 is a prime.

Together with 55728161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55728161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27864081 + 27864082.

It is an arithmetic number, because the mean of its divisors is an integer number (27864082).

Almost surely, 2^55728163 is an apocalyptic number.

55728163 is a deficient number, since it is larger than the sum of its proper divisors (1).

55728163 is an equidigital number, since it uses as much as digits as its factorization.

55728163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 55728163 is about 7465.1298046317. The cubic root of 55728163 is about 381.9661780313.

The spelling of 55728163 in words is "fifty-five million, seven hundred twenty-eight thousand, one hundred sixty-three".