55108643 has 2 divisors, whose sum is σ = 55108644. Its totient is φ = 55108642.

The previous prime is 55108637. The next prime is 55108717. The reversal of 55108643 is 34680155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55108643 - 2⁶ = 55108579 is a prime.

It is equal to p_3288371 and since 55108643 and 3288371 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (55108043) 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, 27554321 + 27554322.

It is an arithmetic number, because the mean of its divisors is an integer number (27554322).

Almost surely, 2^55108643 is an apocalyptic number.

55108643 is a deficient number, since it is larger than the sum of its proper divisors (1).

55108643 is an equidigital number, since it uses as much as digits as its factorization.

55108643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 55108643 is about 7423.5195830549. The cubic root of 55108643 is about 380.5454839049.

Adding to 55108643 its reverse (34680155), we get a palindrome (89788798).

The spelling of 55108643 in words is "fifty-five million, one hundred eight thousand, six hundred forty-three".