55317971 has 2 divisors, whose sum is σ = 55317972. Its totient is φ = 55317970.

The previous prime is 55317959. The next prime is 55317973. The reversal of 55317971 is 17971355.

55317971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55317971 - 2¹⁸ = 55055827 is a prime.

Together with 55317973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55317973) 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, 27658985 + 27658986.

It is an arithmetic number, because the mean of its divisors is an integer number (27658986).

Almost surely, 2^55317971 is an apocalyptic number.

55317971 is a deficient number, since it is larger than the sum of its proper divisors (1).

55317971 is an equidigital number, since it uses as much as digits as its factorization.

55317971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33075, while the sum is 38.

The square root of 55317971 is about 7437.6051925334. The cubic root of 55317971 is about 381.0267041076.

The spelling of 55317971 in words is "fifty-five million, three hundred seventeen thousand, nine hundred seventy-one".