54820217 has 2 divisors, whose sum is σ = 54820218. Its totient is φ = 54820216.

The previous prime is 54820177. The next prime is 54820253. The reversal of 54820217 is 71202845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54479161 + 341056 = 7381^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 54820217 - 2¹⁸ = 54558073 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54820217.

It is not a weakly prime, because it can be changed into another prime (54820417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27410108 + 27410109.

It is an arithmetic number, because the mean of its divisors is an integer number (27410109).

Almost surely, 2^54820217 is an apocalyptic number.

It is an amenable number.

54820217 is a deficient number, since it is larger than the sum of its proper divisors (1).

54820217 is an equidigital number, since it uses as much as digits as its factorization.

54820217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 54820217 is about 7404.0675982868. The cubic root of 54820217 is about 379.8804263669.

The spelling of 54820217 in words is "fifty-four million, eight hundred twenty thousand, two hundred seventeen".