55618193 has 2 divisors, whose sum is σ = 55618194. Its totient is φ = 55618192.

The previous prime is 55618097. The next prime is 55618229. The reversal of 55618193 is 39181655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40157569 + 15460624 = 6337^2 + 3932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55618193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55618093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27809096 + 27809097.

It is an arithmetic number, because the mean of its divisors is an integer number (27809097).

Almost surely, 2^55618193 is an apocalyptic number.

It is an amenable number.

55618193 is a deficient number, since it is larger than the sum of its proper divisors (1).

55618193 is an equidigital number, since it uses as much as digits as its factorization.

55618193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 55618193 is about 7457.7605888095. The cubic root of 55618193 is about 381.7147642730.

The spelling of 55618193 in words is "fifty-five million, six hundred eighteen thousand, one hundred ninety-three".