55554217 has 2 divisors, whose sum is σ = 55554218. Its totient is φ = 55554216.

The previous prime is 55554211. The next prime is 55554251. The reversal of 55554217 is 71245555.

It is an a-pointer prime, because the next prime (55554251) can be obtained adding 55554217 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55041561 + 512656 = 7419^2 + 716^2 .

It is a cyclic number.

It is not a de Polignac number, because 55554217 - 2¹¹ = 55552169 is a prime.

It is not a weakly prime, because it can be changed into another prime (55554211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777108 + 27777109.

It is an arithmetic number, because the mean of its divisors is an integer number (27777109).

Almost surely, 2^55554217 is an apocalyptic number.

It is an amenable number.

55554217 is a deficient number, since it is larger than the sum of its proper divisors (1).

55554217 is an equidigital number, since it uses as much as digits as its factorization.

55554217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35000, while the sum is 34.

The square root of 55554217 is about 7453.4701314220. The cubic root of 55554217 is about 381.5683496326.

The spelling of 55554217 in words is "fifty-five million, five hundred fifty-four thousand, two hundred seventeen".