55728017 has 2 divisors, whose sum is σ = 55728018. Its totient is φ = 55728016.

The previous prime is 55727999. The next prime is 55728059. The reversal of 55728017 is 71082755.

55728017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48497296 + 7230721 = 6964^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 55728017 - 2¹⁴ = 55711633 is a prime.

It is a super-2 number, since 2×55728017² = 6211223757504578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55728217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27864008 + 27864009.

It is an arithmetic number, because the mean of its divisors is an integer number (27864009).

Almost surely, 2^55728017 is an apocalyptic number.

It is an amenable number.

55728017 is a deficient number, since it is larger than the sum of its proper divisors (1).

55728017 is an equidigital number, since it uses as much as digits as its factorization.

55728017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 55728017 is about 7465.1200258268. The cubic root of 55728017 is about 381.9658444650.

The spelling of 55728017 in words is "fifty-five million, seven hundred twenty-eight thousand, seventeen".