55717171 has 2 divisors, whose sum is σ = 55717172. Its totient is φ = 55717170.

The previous prime is 55717117. The next prime is 55717187. The reversal of 55717171 is 17171755.

55717171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (55717117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55717171 - 2⁹ = 55716659 is a prime.

It is not a weakly prime, because it can be changed into another prime (55717271) 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, 27858585 + 27858586.

It is an arithmetic number, because the mean of its divisors is an integer number (27858586).

Almost surely, 2^55717171 is an apocalyptic number.

55717171 is a deficient number, since it is larger than the sum of its proper divisors (1).

55717171 is an equidigital number, since it uses as much as digits as its factorization.

55717171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8575, while the sum is 34.

The square root of 55717171 is about 7464.3935453592. The cubic root of 55717171 is about 381.9410629723.

The spelling of 55717171 in words is "fifty-five million, seven hundred seventeen thousand, one hundred seventy-one".