55164217 has 2 divisors, whose sum is σ = 55164218. Its totient is φ = 55164216.

The previous prime is 55164211. The next prime is 55164257. The reversal of 55164217 is 71246155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53934336 + 1229881 = 7344^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 55164217 - 2¹⁵ = 55131449 is a prime.

It is not a weakly prime, because it can be changed into another prime (55164211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27582108 + 27582109.

It is an arithmetic number, because the mean of its divisors is an integer number (27582109).

Almost surely, 2^55164217 is an apocalyptic number.

It is an amenable number.

55164217 is a deficient number, since it is larger than the sum of its proper divisors (1).

55164217 is an equidigital number, since it uses as much as digits as its factorization.

55164217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 55164217 is about 7427.2617430652. The cubic root of 55164217 is about 380.6733605776.

The spelling of 55164217 in words is "fifty-five million, one hundred sixty-four thousand, two hundred seventeen".