55197617 has 2 divisors, whose sum is σ = 55197618. Its totient is φ = 55197616.

The previous prime is 55197587. The next prime is 55197671. The reversal of 55197617 is 71679155.

Together with next prime (55197671) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50353216 + 4844401 = 7096^2 + 2201^2 .

It is a cyclic number.

It is not a de Polignac number, because 55197617 - 2¹⁰ = 55196593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55197697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27598808 + 27598809.

It is an arithmetic number, because the mean of its divisors is an integer number (27598809).

Almost surely, 2^55197617 is an apocalyptic number.

It is an amenable number.

55197617 is a deficient number, since it is larger than the sum of its proper divisors (1).

55197617 is an equidigital number, since it uses as much as digits as its factorization.

55197617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66150, while the sum is 41.

The square root of 55197617 is about 7429.5098761628. The cubic root of 55197617 is about 380.7501732032.

The spelling of 55197617 in words is "fifty-five million, one hundred ninety-seven thousand, six hundred seventeen".