55318603 has 2 divisors, whose sum is σ = 55318604. Its totient is φ = 55318602.

The previous prime is 55318559. The next prime is 55318607. The reversal of 55318603 is 30681355.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55318603 is a prime.

It is not a weakly prime, because it can be changed into another prime (55318607) 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, 27659301 + 27659302.

It is an arithmetic number, because the mean of its divisors is an integer number (27659302).

Almost surely, 2^55318603 is an apocalyptic number.

55318603 is a deficient number, since it is larger than the sum of its proper divisors (1).

55318603 is an equidigital number, since it uses as much as digits as its factorization.

55318603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 55318603 is about 7437.6476792061. The cubic root of 55318603 is about 381.0281551608.

Adding to 55318603 its reverse (30681355), we get a palindrome (85999958).

The spelling of 55318603 in words is "fifty-five million, three hundred eighteen thousand, six hundred three".