55918193 has 2 divisors, whose sum is σ = 55918194. Its totient is φ = 55918192.

The previous prime is 55918183. The next prime is 55918201. The reversal of 55918193 is 39181955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55011889 + 906304 = 7417^2 + 952^2 .

It is a cyclic number.

It is not a de Polignac number, because 55918193 - 2¹² = 55914097 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 55918193.

It is not a weakly prime, because it can be changed into another prime (55918123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27959096 + 27959097.

It is an arithmetic number, because the mean of its divisors is an integer number (27959097).

Almost surely, 2^55918193 is an apocalyptic number.

It is an amenable number.

55918193 is a deficient number, since it is larger than the sum of its proper divisors (1).

55918193 is an equidigital number, since it uses as much as digits as its factorization.

55918193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 41.

The square root of 55918193 is about 7477.8468157619. The cubic root of 55918193 is about 382.3998467616.

The spelling of 55918193 in words is "fifty-five million, nine hundred eighteen thousand, one hundred ninety-three".